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Fever, quintan
Quintan means recurring every 5 days, the characteristic duration of trench fever. Quintan or trench fever is a disease borne by body lice that was first recognized in the ...
Fever, remittent
A type of fever that gradually decreases in intensity over time.
Fever, Rocky Mountain spotted (RMSF)
An acute febrile (feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by hard-shelled (ixodid) ticks. Occurs only in ...
Fever, scarlet
Also called scarlatina, a disease caused by infection with group A streptococcal bacteria that occurs in a small proportion of people with strep throat. The incubation period ...
Fever, shin bone
Called shin bone fever because it characteristically causes fever and pain in the legs, this disease is also known as trench fever. It is a disease borne by body lice that was ...
Fever, Southeast Asian hemorrhagic
A syndrome due to the dengue virus that tends to affect children under 10, causing abdominal pain, hemorrhage (bleeding) and circulatory collapse (shock). Known also as dengue ...
Fever, splenic
Known also as anthrax, splenic fever is a serious bacterial infection. It is not primarily a human disease but rather an infection of animals. Cattle, sheep, horses, mules, and ...
Fever, spotted
Also known as Rocky Mountain spotted fever. An acute febrile (feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by ...
Fever, Thai hemorrhagic
A syndrome due to the dengue virus that tends to affect children under 10, causing abdominal pain, hemorrhage (bleeding) and circulatory collapse (shock). Known also as dengue ...
Fever, tick
Also known as Rocky Mountain spotted fever, an acute febrile (feverish) disease initially recognized in the Rocky Mountain states, caused by Rickettsia rickettsii transmitted by ...
Fever, trench
A disease borne by body lice that was first recognized in the trenches of World War I, when it is estimated to have affected more than a million people in Russia and on the fronts ...
Fever, undulant
An infectious disease due to the bacteria Brucella that characteristically causes rising and falling fevers, sweats, malaise, weakness, anorexia, headache, myalgia (muscle ...
Fever, valley
A disease also called coccidioidomycosis (CM) due to a fungus called Coccidioides immitis. About 40% of people infected with this fungus develop symptoms. Most often they have ...
Fever, West Nile
A febrile disease caused by the West Nile virus that is transmitted from birds to the common Culex mosquito and then to people. The virus is named after the area it was first ...
Fever, Wolhynia
Also known as trench fever, a disease borne by body lice that was first recognized in the trenches of World War I, when it is estimated to have affected more than a million ...
Fever, yellow
An acute systemic (bodywide) illness caused by a virus called a Flavivirus. In severe cases, the viral infection causes a high fever, bleeding into the skin, and necrosis ...
feverish
1. SYN: febrile. 2. Having a fever.
FF
Abbreviation for filtration fraction.
FFA
Abbreviation for unesterified free fatty acid.
FFP
Abbreviation for fresh frozen plasma.
FGAR
Abbreviation for N-formylglycinamide ribotide.
FGFR2
A mutation (change) in the fibroblast growth factor receptor 2 (FGFR2) gene on chromosome 10 causes the best-known type of acrocephalosyndactyly, namely Apert syndrome which is ...
FH4
Abbreviation for tetrahydrofolic acid. See 5,6,7,8-tetrahydrofolate dehydrogenase, tetrahydrofolate methyltransferase.
Fiber
The parts of plants that cannot be digested, namely complex carbohydrates. Also known as bulk or roughage. Complex carbohydrates from plants are rich in starch and fiber. ...
Fiber and bowel disorders
High fiber diets help delay the progression of diverticulosis and, at least, reduce the bouts of diverticulitis. In many cases, it helps reduce the symptoms of the Irritable ...
Fiber and cholesterol
Soluble fiber substances are effective in helping reduce the blood cholesterol. This is especially true with oat bran, fruits, psyllium and legumes. High soluble-fiber diets may ...
Fiber and constipation
Insoluble fiber retains water in the colon, resulting in a softer and larger stool. It is used effectively in treating constipation resulting from poor dietary habits. Bran is ...
Fiber FISH
A cytogenetic (chromosome) laboratory technique in which FISH (fluorescence in situ hybridization) is done on chromosomes that have been mechanically stretched. Fiber FISH ...
fiberoptic
Pertaining to fiberoptics.
fiberoptics
optical system in which the image is conveyed by a compact bundle of small-diameter, flexible, transparent fibers.
fiberscope
SYN: flexible endoscope.
fibr-
See fibro-.
fibra
SYN: fiber, fiber. [L.] - fibrae arcuatae cerebri [TA] SYN: arcuate fibers of cerebrum, under fiber. - fibrae arcuatae externae SYN: external arcuate fibers, under fiber. - ...
fibrates
SYN: fibric acids.
Fibrates for lowering cholesterol
Fibrates are cholesterol-lowering drugs that are primarily effective in lowering triglycerides and, to a lesser extent, in increasing HDL-cholesterol levels. Gemfibrozil (brand ...
fibre
SYN: fiber.
fibremia
An obsolete term for the presence of formed fibrin in the blood, causing thrombosis or embolism. SYN: inosemia (2). [fibrin + G. haima, blood]
fibric acids
Drugs structurally related to clofibrate, used to treat hypercholesterolemia and hypertriglyceridemia. SYN: fibrates.
Fibril
The diminutive of fiber. A small fiber, a fine thread. * * * A minute fiber or component of a fiber. SYN: fibrilla. [Mod. L. fibrilla] - anchoring fibrils collagen fibrils that ...
fibrilla
SYN: fibril. [Mod. L. dim. of L. fibra, a fiber]
fibrillar, fibrillary
1. Relating to a fibril. 2. Denoting the fine rapid contractions or twitchings of fibers or of small groups of fibers in skeletal or cardiac muscle. SYN: filar (1).
fibrillate
1. To make or to become fibrillar. 2. SYN: fibrillated. 3. To be in a state of fibrillation (3).
fibrillated
Composed of fibrils. SYN: fibrillate (2).
Fibrillation
In matters of the heart (cardiology), fibrillation is incoordinate twitching of the heart muscle fibers. The difference between fibrillation and flutter is that fibrillation is ...
Fibrillation, atrial
An abnormal irregular heart rhythm whereby electrical signals are generated chaotically throughout the upper chambers (atria) of the heart. Although many persons with atrial ...
Fibrillation, ventricular
An abnormal irregular heart rhythm whereby there are very rapid uncoordinated fluttering contractions of the lower chambers (ventricles) of the heart. Ventricular fibrillation ...
fibrillin
A microfibrillar protein in connective tissue with a wide distribution in the body; molecular weight about 350,000. There is good evidence that Marfan syndrome is due to ...
fibrilloflutter
SYN: impure flutter.
fibrillogenesis
The development of fine fibrils (as seen with the electron microscope) normally present in collagenous fibers of connective tissue.
Fibrin
The protein formed during normal blood clotting that is the essence of the clot. * * * An elastic filamentous protein derived from fibrinogen by the action of thrombin, which ...
fibrinase
1. Former term for factor XIII. 2. SYN: plasmin.
fibrino-
Fibrin. [L. fibra, fiber]
fibrinocellular
Composed of fibrin and cells, as in certain types of exudates resulting from acute inflammation.
Fibrinogen
The protein from which fibrin is formed/generated in normal blood clotting * * * A globulin of the blood plasma that is converted into fibrin by the action of thrombin in the ...
fibrinogenase
SYN: thrombin.
fibrinogenemia
SYN: hyperfibrinogenemia.
fibrinogenesis
Formation or production of fibrin.
fibrinogenic, fibrinogenous
1. Pertaining to fibrinogen. 2. Producing fibrin.
fibrinogenolysis
The inactivation or dissolution of fibrinogen in the blood. [ fibrinogen + G. lysis, dissolution]
fibrinogenopenia
A concentration of fibrinogen in the blood that is less than the normal. [ fibrinogen + G. penia, poverty]
fibrinoid
1. Resembling fibrin. 2. A deeply or brilliantly acidophilic, homogeneous, proteinaceous material that: 1) is frequently formed in the walls of blood vessel s and in ...
fibrinokinase
Name proposed for the enzyme that converts plasminogen to plasmin; subsequently called urokinase, but now called plasminogen activator. SYN: fibrinolysokinase.
fibrinolysin
SYN: plasmin. - streptococcal f. SYN: streptokinase.
fibrinolysis
1. Hydrolysis of fibrin. 2. The process of dissolution of fibrin in blood clots. [ fibrino- + G. lysis, dissolution]
fibrinolysokinase
SYN: fibrinokinase.
fibrinolytic
Denoting, characterized by, or causing fibrinolysis.
fibrinopeptide
One of two pairs of peptides (A and B) released from the amino-terminal ends of 2α- (or Aα-) and 2β- (or Bβ-)chains of fibrinogen by the action of thrombin to form fibrin; ...
fibrinopurulent
Pertaining to pus or suppurative exudate that contains a relatively large amount of fibrin.
fibrinoscopy
The chemical and physical examination of the fibrin of exudates, blood clots, etc. [ fibrino- + G. skopeo, to view]
fibrinous
Pertaining to or composed of fibrin.
fibrinuria
The passage of urine that contains fibrin. [fibrin + G. ouron, urine]
fibro-, fibr-
Fiber. [L. fibra]
fibro-osteoma
An osteoma in which the neoplastic bone-forming cells are situated within a relatively abundant stroma of fibrous tissue.
fibroadenoma
A benign neoplasm derived from glandular epithelium, in which there is a conspicuous stroma of proliferating fibroblasts and connective tissue elements; commonly occurs in breast ...
fibroadipose
Relating to or containing both fibrous and fatty structures. SYN: fibrofatty.
fibroareolar
Denoting connective tissue that is both fibrous and areolar in character.
fibroblast
A stellate or spindle-shaped cell with cytoplasmic processes present in connective tissue, capable of forming collagen fibers; an inactive f. is sometimes called a fibrocyte.
Fibroblast growth factor receptor 2
A mutation (change) in the fibroblast growth factor receptor 2 (FGFR2) gene on chromosome 10 causes the best-known type of acrocephalosyndactyly, namely Apert syndrome which is ...
fibroblastic
Relating to fibroblasts.
fibrocartilage
A variety of cartilage that contains visible type I collagen fibers; appears as a transition between tendons or ligaments or bones. SYN: fibrocartilago. - basilar f. SYN: ...
fibrocartilaginous
Relating to or composed of fibrocartilage.
fibrocartilago
SYN: fibrocartilage. - f. basalis SYN: basilar cartilage. - f. interarticularis SYN: articular disk. - f. interpubica interpubic disk. - f. intervertebralis SYN: ...
fibrocellular
Both fibrous and cellular.
fibrochondritis
Inflammation of a fibrocartilage.
fibrochondroma
A benign neoplasm of cartilaginous tissue, in which there is a relatively unusual amount of fibrous stroma.
fibrocongestive
Term sometimes used to indicate the general condition of an organ or tissue in which acute or chronic, persistent congestion has resulted in degeneration and necrosis of cells ...
fibrocystic
Pertaining to or characterized by the presence of fibrocysts.
fibrocyte
Designation sometimes applied to an inactive fibroblast. [fibro- + G. kytos, cell]
fibrodysplasia
Abnormal development of fibrous connective tissue. - f. ossificans progressiva [MIM*135100] a generalized disorder of connective tissue in which there is ectopic ossification ...
Fibrodysplasia ossificans progressiva (FOP)
A rare but dramatic genetic disorder that turns muscles, tendons and ligaments into bone, threatening to transform the victim into "a statue of stone." FOP is characterized by ...
fibroelastic
Composed of collagen and elastic fibers.
fibroelastosis
Excessive proliferation of collagenous and elastic fibrous tissue. - endocardial f., endomyocardial f. 1. a congenital condition characterized by thickening of the left ...
fibroepithelioma
A skin tumor composed of fibrous tissue intersected by thin anastomosing bands of basal cells of the epidermis, enclosing keratin cysts; may give rise to basal cell carcinoma of ...
fibrofatty
SYN: fibroadipose.
fibrofolliculoma
Small papular hamartomas of the fibrous sheath of the hair follicle, with solid extensions of the epithelium of the follicular infundibulum; multiple fibrofolliculomas may be ...
fibrogenesis
The production or development of fibers.
fibrogliosis
A cellular reaction within the brain, usually in response to a penetrating injury, in which both astrocytes and fibroblasts participate and which culminates in a fibrous and ...
Fibroid
: A benign tumor of the uterus and the single most common indication for hysterectomy. Fibroids can be present and be inapparent. However, they are clinically apparent in up to ...
fibroidectomy
SYN: myomectomy. [ fibroid + G. ektome, excision]
fibroin
A white insoluble protein forming the primary constituent (70%) of cobweb and silk.
fibroleiomyoma
A leiomyoma containing non-neoplastic collagenous fibrous tissue, which may make the tumor hard; f. usually arises in the myometrium, and the proportion of fibrous tissue ...
fibrolipoma
A lipoma with an abundant stroma of fibrous tissue. SYN: lipoma fibrosum.
fibroma
A benign neoplasm derived from fibrous connective tissue. [fibro- + G. -oma, tumor] - ameloblastic f. a benign mixed odontogenic tumor characterized by neoplastic proliferation of ...
Fibroma, cemento-ossifying
A hard fibrous lesion that continues to grow, sometimes to very large size, unless treated, most frequently seen in the jaw or mouth, sometimes in connection with a fracture or ...
Fibroma, desmoplastic
A rare type of primary bone tumor characteristically composed of well-differentiated cells that produce collagen. Desmoplastic fibromas are discovered most often in the first ...
Fibroma, nonossifying
A growing lesion with a fibroma structure. Treatment is by surgery.
fibromatoid
A focus, nodule, or mass (of proliferating fibroblasts) that resembles a fibroma but is not regarded as neoplastic.
fibromatosis
1. A condition characterized by multiple fibromas, with relatively widespread distribution. 2. Abnormal hyperplasia of fibrous tissue. - abdominal f. SYN: desmoid (2). - ...
fibromatous
Pertaining to, or of the nature of, a fibroma.
fibromectomy
SYN: myomectomy.
fibrometer
An instrument that measures clot formation (as in tests for blood clotting in vitro) by mechanical detection of the clot by a moving probe.
fibromuscular
Both fibrous and muscular; relating to both fibrous and muscular tissues.
fibromyalgia
A syndrome of chronic pain of musculoskeletal origin but uncertain cause. The American College of Rheumatology has established diagnostic criteria that include pain on both ...
fibromyectomy
Excision of a fibromyoma.
fibromyoma
A leiomyoma that contains a relatively abundant amount of fibrous tissue.
fibromyositis
Chronic inflammation of a muscle with an overgrowth, or hyperplasia, of the connective tissue. [fibro- + G. mys, muscle, + -itis, inflammation]
fibromyxoma
A myxoma that contains a relatively abundant amount of mature fibroblasts and connective tissue. [fibro- + G. myxa, mucus, + -oma, tumor]
fibronectins
High molecular weight multifunctional glycoproteins found on cell surface membranes and in blood plasma and other body fluids. F. are thought to function as adhesive ligandlike ...
fibroneuroma
SYN: neurofibroma.
fibropapilloma
A papilloma characterized by a conspicuous amount of fibrous connective tissue at the base and forming the cores upon which the neoplastic epithelial cells are massed.
fibroplasia
Production of fibrous tissue, usually implying an abnormal increase of nonneoplastic fibrous tissue. [fibro- + G. plasis, a molding] - retrolental f. SYN: retinopathy of ...
fibroplastic
Producing fibrous tissue. [fibro- + G. plastos, formed]
fibroplate
SYN: articular disk.
fibropolypus
A polyp composed chiefly of fibrous tissue.
fibroreticulate
Relating to or consisting of a network of fibrous tissue.
fibrosa
pericardium f. [TA] See pericardium.
fibrosarcoma
A malignant neoplasm derived from deep fibrous tissue, characterized by bundles of immature proliferating fibroblasts arranged in a distinctive herringbone pattern with variable ...
fibrose
To form fibrous tissue.
fibroserous
Composed of fibrous tissue with a serous surface; denoting any serous membrane.
fibrosis
Formation of fibrous tissue as a reparative or reactive process, as opposed to formation of fibrous tissue as a normal constituent of an organ or tissue. - African endomyocardial ...
Fibrosis, cystic (CF)
One of the most common grave genetic (inherited) diseases, CF affects the exocrine glands and is characterized by the production of abnormal secretions, leading to mucous ...
Fibrosis, pulmonary
Scarring throughout the lungs which can be caused by many conditions such as, sarcoidosis, hypersensitivity pneumonitis, asbestosis, and certain medications. Chronic pulmonary ...
Fibrosis, radiation
Scarring of the lungs from radiation. Radiation fibrosis is a sequel of radiation pneumonitis (inflammation of the lungs due to radiation), as from radiation therapy. ...
Fibrositis
Also known as fibromyalgia, this disorder chronically causes pain, stiffness, and tenderness of muscles, tendons, and joints without detectable inflammation. Fibromyalgia does ...
fibrothorax
Fibrosis of the pleural space.
fibrotic
Pertaining to or characterized by fibrosis.
fibrous
Composed of or containing fibroblasts, and also the fibrils and fibers of connective tissue formed by such cells.
Fibrous dysplasia, monostotic
Excessive growth of hard fibrous tissue that replaces normal bone tissue in a single bone. Symptoms may include pain and fracture of the bone. Most cases are diagnosed in ...
Fibrous dysplasia, polyostotic
A genetic disorder of bones, skin pigmentation and hormonal problems with premature sexual development. Also called McCune-Albright syndrome or the Albright syndrome. In the ...
fibroxanthoma
A fibrohistiocytic neoplasm. - atypical f. a solitary, often ulcerated, small, cutaneous, usually benign, tumor composed of foamy histiocytes, spindle cells, and bizarre giant ...
Fibula
The lateral (outside) and smaller of the two long bones in the lower leg between the knee and ankle. (The other bone in the lower leg is the tibia.) The fibula is not weight ...
fibular
Relating to the fibula. SYN: fibularis, peroneal. [L. fibularis]
fibularis
SYN: fibular, fibular. [Mod. L.]
fibulocalcaneal
Relating to the fibula and the calcaneus.
ficain
SYN: ficin (2).
ficin
1. A cysteine endopeptidase isolated from figs (Ficus carica, globata, and doliaria); used in industry as a protein digestant; f. has a wide specificity for protein ...
Fick
Adolf, German physician, 1829–1901. See F. method, F. principle.
Fičvre boutonneuse
African tick typhus, one of the tick-borne rickettsial diseases of the eastern hemisphere, similar to Rocky Mountain spotted fever, but less severe, with fever, a small ulcer ...
FID
Abbreviation for free induction decay.
Fiedler
Carl L.A., German physician, 1835–1921. See F. myocarditis.
field
A definite area of plane surface, considered in relation to some specific object. [A.S. feld] - auditory f. the space included within the limits of hearing of a definite sound, as ...
Field rapid stain
See under stain.
Field, visual
The entire area that can be seen when the eye is directed forward, including that which is seen with peripheral vision. The visual field can be tested to measure the extent and ...
field-vole
A species of field mouse (Microtus montebelloi), normal host of Leptospira hebdomadis, the cause of a type of leptospirosis resembling infectious mononucleosis.
Fielding
George H., British anatomist, 1801–1871. See F. membrane.
Fiessinger
Noël Armand, French physician, 1881–1946. See F.-Leroy- Reiter syndrome.
fièvre
French term for fever. - f. boutonneuse SYN: Mediterranean spotted fever.
Fifth cranial nerve
The fifth cranial nerve is the trigeminal nerve. The trigeminal nerve is quite complex. It functions both as the chief nerve of sensation for the face and the motor nerve ...
Fifth disease
An oddly named disease caused by a virus called parvovirus B 19. (In the pre-vaccination era, fifth disease was frequently the "fifth disease" that a child contracted.) ...
fig
Ficus, the partially dried fruit of Ficus carica (family Moraceae); used as a nutrient, mild laxative, and demulcent. [L. ficus; A.S. fic]
FIGLU
Abbreviation for formiminoglutamic acid.
figuratus
Figured; a term descriptive of certain skin lesions. [L. figuro, pp. -atus, to form, fashion]
figure
1. A form or shape. 2. A person representing the essential aspects of a particular role ( e.g., relating to one's male boss as a father f. or to one's female teacher as a mother ...
figure and ground
That aspect of perception wherein the perceived is separated into at least two parts, each with different attributes but influencing one another. Figure is the most distinct; ...
fila
Plural of filum. [L.]
filaceous
SYN: filamentous. [L. filum, a thread]
filaggrin
A major protein of the keratohyalin granule, composed mostly of l-histidyl, lysyl, and arginyl residues ( stratum corneum basic proteins). It aggregates keratin intermediate ...
filamen, filamin
A high molecular weight, actin-binding protein that is part of the intracellular filamentous structure of fibroblastic cells; its distribution in cells is derived from its ...
filament
1. SYN: filamentum. 2. In bacteriology, a fine threadlike form, unsegmented or segmented without constrictions. [L. filamentum, fr. filum, a thread] - actin f. one of the ...
filamentous
1. Threadlike in structure. SYN: filiform (1). 2. Composed of filaments or threadlike structures. SYN: filaceous, filar (2).
filamentum
A fibril, fine fiber, or threadlike structure. SYN: filament (1). [L.]
filar
1. SYN: fibrillar. 2. SYN: filamentous. [L. filum, a thread]
Filaria
Former genus of nematodes now classified in several genera and species of the family Onchocercidae; e.g., Wuchereria bancrofti (F. bancrofti, F. diurna, or F. nocturna), Brugia ...
filaria
Common name for nematodes of the family Onchocercidae, which live as adults in the blood, tissue fluids, tissues, or body cavities of many vertebrates. The females lay partially ...
filarial
Pertaining to a filaria (or filariae), including the microfilaria stage.
filariasis
Presence of filariae in the tissues of the body or in blood ( microfilaremia) or tissue fluids (microfilariasis), occurring in tropical and subtropical regions; living worms cause ...
Filariasis, lymphatic
A parasitic disease caused by microscopic, thread-like worms called filaria. The adult worms only live in the human lymph system. (The lymph system helps maintain the body's ...
filaricidal
Fatal to filariae.
filaricide
An agent that kills filariae. [ filaria + L. caedo, to kill]
filariform
1. Resembling filariae or other types of small nematode worms. SEE ALSO: f. larva. 2. Thin or hairlike.
Filariicae
SYN: Filarioidea.
Filarioidea
A superfamily of filarial nematodes parasitic in many animal species, including man; includes the families Filariidae, Diplotraenidae, Onchocercidae, and Stephanofilariidae. See ...
Filatov
Nil F., Russian pediatrician, 1847–1902. See F. disease. Vladimir P., Russian ophthalmologist, 1875–1956. See F. flap, F.- Gillies flap.
file
A tool for smoothing, grinding, or cutting. - Hedström f. a coarse root canal f. similar to a rasp. - periodontal f. an instrument with a series of ridges or points arranged in ...
filial
Denoting the relationship of offspring to parents. See f. generation. [L. filialis, fr. filius, son, filia, daughter]
filiform
1. SYN: filamentous (1). 2. In bacteriology, denoting an even growth along the line of inoculation, either stroke or stab. [L. filum, thread]
filiform adnatum
SYN: ankyloblepharon.
filioparental
Pertaining to a child-parent relationship. [L. filius, son, + parens, parent, fr. pario, to give birth]
fillet
1. SYN: lemniscus. 2. A skein, loop of cord, or tape used for making traction on a part of the fetus. [Fr. filet, a band] - lateral f. SYN: lateral lemniscus. - medial f. ...
filling
Lay term for a dental restoration.
film
1. A thin sheet of flexible material coated with a light-sensitive or x-ray–sensitive substance used in taking photographs or radiographs. 2. A thin layer or coating. 3. A ...
film changer
A device that moves film for radiographic studies that require rapid serial x-ray exposures, such as angiography. SYN: rapid f., serial f.. - rapid f. SYN: f.. - serial f. SYN: ...
Film, AP
An X-ray picture in which the beams pass from front-to-back (anteroposterior). As opposed to a PA (posteroanterior) film in which the rays pass through the body from back-to-front.
Film, PA
An X-ray picture in which the beams pass from back-to-front (posteroanterior). As opposed to an AP (anteroposterior) film in which the rays pass through the body from ...
Filmer
David L., U.S. biochemist, *1932. See Adair-Koshland-Némethy-F. model, Koshland-Némethy-F. model.
filopodia
Plural of filopodium.
filopodium
A slender filamentous pseudopodium of certain free-living amebae. [L. filum, thread, + G. pous, foot]
filopressure
Temporary pressure on a blood vessel by a ligature, which is removed when the flow of blood has ceased. [L. filum, thread]
filovaricosis
A series of swellings along the course of the axon of a nerve fiber. [L. filum, thread, + varix, dilation of vein]
Filoviridae
A family of viruses that cause hemorrhagic fever. Filoviviruses have single- stranded RNA as their genetic material. Ebola virus and the Marburg virus are both filoviruses. * * ...
Filovirus
A family of viruses that cause hemorrhagic fever. Filoviviruses have single- stranded RNA as their genetic material. Ebola virus and the Marburg virus are both filoviruses. * * ...
filter
1. A porous substance through which a liquid or gas is passed in order to separate it from contained particulate matter or impurities to sterilize. SYN: filtrum. 2. To use or ...
filtrable, filterable
Capable of passing a filter; frequently applied to smaller viruses and some bacteria.
filtrate
That which has passed through a filter.
filtration
1. The process of passing a liquid or gas through a filter. 2. In radiology, the process of attenuating and hardening a beam of x- or gamma rays by interposing a filter (3) ...
filtrum
SYN: filter (1). [Mediev. L.] - Merkel f. ventriculi SYN: f. ventriculi. - f. ventriculi a groove between the two prominences, in each lateral wall of the vestibule of the ...
filum
A structure of filamentous or threadlike appearance. [L. thread] - f. durae matris spinalis SYN: dural part of f. terminale. - fila olfactoria [TA] SYN: olfactory nerves [CN ...
fimbria
1. [TA] Any fringelike structure. SYN: fringe. 2. SYN: pilus (2). [L. fringe] - f. hippocampi [TA] a narrow sharp-edged crest of white fiber matter, continuous with the ...
fimbriate, fimbriated
Having fimbriae.
fimbriectomy
Excision of fimbriae. [L. fimbria, fringe, + G. ektome, excision]
fimbrin
An actin-binding protein that cross-links adjacent filaments tightly to form parallel actin fibers in vertebrate cells. It assists in maintaining cell polarity and development. ...
fimbriocele
Hernia of the corpus fimbriatum of the oviduct. [L. fimbria, fringe, + G. kele, hernia]
fimbrioplasty
Corrective operation upon the tubal fimbriae. [L. fimbria, fringe, + G. plastos, formed]
finasteride
A competitive inhibitor of steroid 5α-reductase, an intracellular enzyme that converts testosterone into 5α-dihydrotestosterone, a potent androgen; used in the treatment of ...
Finckh
Johann, German psychiatrist, *1873. See F. test.
finding
A clinically significant observation, usually used in relation to one found on physical examination or laboratory test.
Fine needle aspiration
: The use of a thin needle to withdraw material from the body. For example, this method is commonly used to determine whether a nodule in the thyroid gland is benign or malignant. ...
fineness
A designator used to indicate the precious metal content of an alloy, 1000 fine being 24-carat or pure gold.
finger
One of the digits of the hand. SYN: digitus manus [TA]. [A.S.] - baseball f. an avulsion, partial or complete, of the long f. extensor from the base of the distal phalanx. ...
finger spelling
A system of communication with a profoundly hearing impaired person by spelling words in which the letters of the alphabet are represented by positions of the fingers.
Fingernail
A fingernail is produced by living skin cells in the finger. A fingernail consists of several parts including the nail plate (the visible part of the nail), the nail bed (the skin ...
fingerprint
1. An impression of the inked bulb of the distal phalanx of a finger, showing the configuration of the surface ridges, used as a means of identification. SEE ALSO: ...
Fingers, six
The presence of an extra finger, a very common congenital malformation (birth defect). This condition is called hexadactyly. The word hexadactyly literally means six digits. ...
Finished DNA sequence
A DNA sequence in which the bases are identified to an accuracy of no more than 1 error in 10,000 and are placed in the right order and orientation along a chromosome with ...
Fink
R.P., 20th century U.S. anatomist. See F.-Heimer stain.
Finkeldey
Wilhelm, 20th century German pathologist. See Warthin-F. cells, under cell.
Finney
John M.T., U.S. surgeon, 1863–1942. See F. operation, F. pyloroplasty.
fire
In dentistry, the fusing of water and a powder containing kaolin, feldspar, and other substances to produce porcelain used in restorations and artificial teeth.
Fire ant sting
A scourge, these red or yellow ants of small-to-medium size, originally from South America, have a severe sting that burns like fire. Their sting—like that of bees, yellow ...
Fire ants
Originally from S. America. Among the worst insect pests ever to invade the US. Red or yellowish ants of small-to-medium size with a severe sting that burns like fire. They ...
Fire supplies kit
You and your family can cope best by preparing for disaster before it strikes. One way to prepare is by assembling a Disaster Supplies Kit. Once disaster hits, you won't have time ...
Fire, St. Anthony's
The intensely painful burning sensation in the limbs and extremities caused by ergot, the consequence of a fungus (Claviceps purpurea) that contaminates rye and wheat. The fungus ...
firedamp
Methane or other light hydrocarbons forming an explosive mixture when mixed with 7 or 8 volumes of air.
first aid
Immediate assistance administered in the case of injury or sudden illnes by a bystander or other lay person, before the arrival of trained medical personnel.
First American medical journal
The first medical journal in the US was the Medical Repository. It was founded in 1797 and published quarterly until 1824. The Medical Repository was “the first serious ...
First American medical school
King's College Medical School founded in New York in 1767. Its mission was fairly lofty — to "enlarge the Mind, improve the Understanding, polish the whole Man, and qualify them ...
First cranial nerve
The first cranial nerve is the olfactory nerve, the nerve that carries impulses for the sense of smell from the nose to the brain. The cranial nerves emerge from or enter the ...
First do no harm
Slogan used in medicine often in the Latin wording “primum non nocere,” a fundamental medical precept of Hippocrates (ca. 460-ca. 377 B.C).
First stage of labor
The part of labor when the cervix dilates fully (to 10 centimeters). The first stage of labor is also called the stage of dilatation.
Fischer
Louis, U.S. pediatrician, 1864–1945. See F. sign, F. symptom. Emil, German chemist and Nobel laureate, 1852–1919. See F. projection formulas of sugars, Kiliani-F. synthesis, ...
FISH
Abbreviation for fluorescence in situ hybridization, a molecular technique used in chromosome studies. FISH employs fluorescent (fluorescein tags) that glow under ultraviolet ...
fish berry
The seeds of Anamirta paniculata which contain the amaroid, picrotoxin; a CNS and respiratory stimulant, used in veterinary medicine as an antidote to barbiturates. Name ...
Fish bowl granuloma
Localized nodular skin inflammation (small reddish raised areas of skin) caused by a bacterium called mycobacterium marinum. Fish bowl granuloma is typically acquired by ...
Fish oil, omega-3
A class of fatty acids found in fish oils, especially from salmon and other cold-water fish, that acts to lower the levels of cholesterol and LDL (low-density lipoproteins) in ...
Fish-odor syndrome
An inborn error of metabolism associated with an offensive body odor, the smell of rotting fish, due to the excessive excretion of trimethylaminuria (TMA) in urine, sweat, and ...
Fishberg
Arthur M., U.S. physician, *1898. See F. concentration test.
Fisher
Ronald A., British medical statistician and geneticist, 1890–1962; invented many statistical tests. C. Miller, U.S. neurologist, *1910. See F. syndrome.
Fisher’s exact test
A statistical test of independence much used in medical research. It tests the independence of rows and columns in a 2 X 2 contingency table (with 2 horizontal rows crossing 2 ...
Fishman-Lerner unit
See under unit.
fission
1. The act of splitting, e.g., amitotic division of a cell or its nucleus. 2. Splitting of the nucleus of an atom. [L. fissio, a cleaving, fr. findo, pp. fissus, to cleave] - ...
fissiparity
SYN: schizogenesis. [L. fissio, cleaving, fr. findo, to cleave, + pario, to bring forth]
fissiparous
Reproducing or propagating by fission. [L. findo, pp. fissus, split, + pario, to produce]
fissula
Diminutive of fissure; a small fissure or cleft. - f. ante fenestram [TA] minute, slitlike passage in the labyrinthine wall of the tympanic cavity, extending obliquely from the ...
fissura
1. SYN: fissure. 2. In neuroanatomy, a particularly deep sulcus of the surface of the brain or spinal cord. [L. fr. findo, to cleave] - f. antitragohelicina [TA] a fissure in ...
fissural
Relating to a fissure.
fissuration
State of being fissured.
Fissure
A cleft or groove. A fissure can be normal or abnormal. A fissure in the cerebral cortex is a normal feature. It is a deep fold that involves the entire thickness of the brain ...
Fissure, palpebral
The opening for the eye between the eyelids.
fistula
An abnormal passage from one epithelial surface to another epithelial surface. [L. a pipe, a tube] - abdominal f. a fistulous passage connecting one of the abdominal viscera to ...
fistulation, fistulization
Formation of a fistula in a part; becoming fistulous.
fistulatome
A long, thin-bladed, probe-pointed knife for slitting open a fistula. SYN: fistula knife, syringotome. [ fistula + G. tome, a cutting]
fistulectomy
Excision of a fistula. SYN: syringectomy. [ fistula + G. ektome, excision]
fistuloenterostomy
An operation connecting a fistula with the intestine. [ fistula + G. enteron, intestine, + stoma, mouth]
fistulotomy
Incision or surgical enlargement of a fistula. SYN: syringotomy. [ fistula + G. tome, incision]
fistulous
Relating to or containing a fistula.

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