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Physiologic stress test
Although there can be a diversity of physiologic stress tests, this refers here to a physiologic cardiac stress test in which certain medications are administered that stimulate ...
physiologic, physiological
1. Relating to physiology. 2. Normal, as opposed to pathologic; denoting the various vital processes. 3. Denoting something that is apparent from its functional effects rather ...
Physiologicjaundice of the newborn
Yellowish staining of the skin and whites of the newborn’s eyes (sclerae) by pigment of bile (bilirubin). In newborn babies a degree of jaundice is normal. It is due to the ...
physiologicoanatomical
Relating to both physiology and anatomy.
physiologist
A specialist in physiology.
Physiology
The study of how living organisms function including such processes as nutrition, movement, and reproduction. The word “function” is important to the definition of physiology ...
physiopathologic
Relating to pathologic physiology.
physiopathology
SYN: pathologic physiology.
physiopsychic
Pertaining to both mind and body.
physiopyrexia
Fever produced by a physical agent. [physio- + G. pyrexis, feverishness]
physiotherapeutic
Pertaining to physical therapy.
physiotherapist
A physical therapist. See physical therapy (2).
physiotherapy
SYN: physical therapy (1). [physio- + G. therapeia, treatment] - oral p. the use of a toothbrush, interdental stimulator, floss, irrigating device, or other adjunctive aid to ...
physique
constitutional type; the physical or bodily structure; the “build.” [Fr.]
physis
A term sometimes used in referring to the epiphysial cartilage. [G. growth]
physo-
1. Tendency to swell or inflate. 2. Relation to air or gas. [G. physao, to inflate, distend]
physocele
1. A circumscribed swelling due to the presence of gas. 2. A hernial sac distended with gas. [ physo- + G. kele, tumor, hernia]
Physocephalus sexalatus
A small species of spiruroid nematodes (family Spiruridae) found in the stomach of pigs, horses, camels, rabbits, and hares; worldwide in distribution, and especially prevalent ...
physocephaly
Swelling of the head resulting from introduction of air into the subcutaneous tissues. [ physo- + G. kephale, head]
physometra
Distention of the uterine cavity with air or gas. SYN: uterine tympanites. [ physo- + G. metra, uterus]
Physopsis
A subgenus of the genus Bulinus, most species of which transmit the human blood fluke, Schistosoma haematobium, and some animal schistosomes in Africa south of the Sahara. [G. ...
physopyosalpinx
Pyosalpinx accompanied by a formation of gas in a uterine tube. [ physo- + G. pyon, pus, + salpinx, trumpet]
physostigma
The dried seed of P. venenosum (family Leguminosae), a vine of western Africa; it contains the alkaloids physostigmine (eserine), eseramine, eseridine (geneserine) and ...
physostigmine
An alkaloid of physostigma; it is a reversible inhibitor of the cholinesterases, and prevents destruction of acetylcholine; used as a cholinergic agent, and experimentally to ...
phyt-
See phyto-.
phytanate
The anion of phytanic acid. - p. α-oxidase an enzyme that oxidizes phytanic acid, removing the carboxyl group.
phytanic acid
A branched-chain fatty acid that accumulates in the serum and tissues in Refsum disease and attributed to the hereditary absence of phytanate α-oxidase; arises from phytol and ...
Phytanic acid storage disease (Refsum’s disease)
A genetic disorder of the fatty acid phytanic acid which accumulates and causes a number of progressive problems including polyneuritis (inflammation of numerous nerves), ...
phytate
A salt or ester of phytic acid.
phytic acid
The hexakisphosphoric ester of myo-inositol; the mixed salt with magnesium and calcium is phytin.
phytin
The calcium magnesium salt of phytic acid; a dietary supplement used to provide calcium, organic phosphorus, and myo-inositol.
phyto-, phyt-
Plants. [G. phyton, a plant]
phytoagglutinin
A lectin that causes agglutination of erythrocytes or of leukocytes.
phytobezoar
A gastric concretion formed of vegetable fibers, with the seeds and skins of fruits, and sometimes starch granules and fat globules. SYN: food ball. [phyto- + bezoar]
Phytochemical
The active health-protecting compounds that are found as components of plants. Currently, the terms "phytochemical" and "phytonutrient" are being used interchangeably to describe ...
phytochemistry
The biochemical study of plants; concerned with the identification, biosynthesis, and metabolism of chemical constituents of plants; especially used in regard to natural products.
phytodermatitis
Dermatitis caused by various mechanisms, including mechanical and chemical injury, allergy, or photosensitization ( phytophotodermatitis) at skin sites previously exposed to ...
Phytoflagellata
A subclass of Phytomastigophorea, the members of which have yellow or green chromatophores. [phyto- + L. flagellum, a whip]
phytohemagglutinin
A phytomitogen from plants that agglutinates red blood cells. The term is commonly used specifically to refer to the lectin obtained from the red kidney bean (Phaseolus ...
phytoid
Resembling a plant; denoting an animal having many of the biologic characteristics of a vegetable. [G. phytodes, fr. phyton, plant, + eidos, resemblance]
phytol
An unsaturated primary alcohol derived from the hydrolysis of chlorophyll; a constituent of vitamins E and K1. SYN: phytyl alcohol.
phytolectin
SYN: phytohemagglutinin.
Phytomastigina
Former term for plant-like flagellates, originally classified as a suborder or order, raised to the class Phytomastigophorea ( Phytomastigophorasida) in recent classifications. ...
Phytomastigophorasida
SYN: Phytomastigophorea.
Phytomastigophorea
A class of the subphylum Mastigophora (flagellates) within the phylum Sarcomastigophora ( flagellate and ameboid protozoans), consisting mostly of free-living plantlike ...
phytomenadione
SYN: phylloquinone.
phytomitogen
A mitogenic lectin causing lymphocyte transformation accompanied by mitotic proliferation of the resulting blast cells identical to that produced by antigenic stimulation; ...
phytonadione
SYN: phylloquinone.
Phytonutrients
The active health-protecting Currently, the terms "phytonutrient" and " phytochemical" are being used interchangeably to describe those plant compounds which are thought to have ...
phytophagous
Plant-eating; vegetarian. [phyto- + G. phago, to eat]
phytophotodermatitis
Phytodermatitis resulting from photosensitization.
phytopneumoconiosis
A chronic fibrous reaction in the lungs due to the inhalation of particles of vegetable origin. [phyto- + pneumoconiosis]
phytoporphyrin
1. A porphyrin similar to the pheophorbide of the chlorophylls but with the vinyl group replaced by an ethyl group, with no methoxycarbonyl group, and minus two hydrogen atoms, ...
phytosis
A disease process caused by infection with a vegetable organism, such as a fungus.
phytosphingosine
A sphingosine derivative isolated from various plants.
phytosterol
Generic term for the sterols of plants.
phytosterolemia
An inherited disorder in which there is a hyperabsorption of phytosterols and shellfish sterols resulting in tendon and tuberous xanthomata. SYN: sitosterolemia.
phytotoxic
1. Poisonous to plant life. 2. Pertaining to a phytotoxin.
phytotoxin
A toxic substance of plant origin. SYN: plant toxin. [phyto- + G. toxikon, poison]
phytotrichobezoar
SYN: trichophytobezoar.
phytyl
The radical found in phylloquinone (vitamin K1); a tetraprenyl radical, reduced in 3 of the 4 prenyl groups.
phytyl alcohol
SYN: phytol.
Pi
Symbol for inorganic orthophosphate (should not be used when covalently linked to another moiety). Abbreviation for inorganic phosphate.
PI
Abbreviation for Periodontal Index.
pI
The pH value for the isoelectric point of a given substance.
pi
1. The 16th letter of the Greek alphabet. 2. (Π). Symbol for osmotic pressure; in mathematics, symbol for the product of a series. 3. (π). Symbol for the ratio of the ...
pia
SYN: p. mater. [L. fem. of pius, tender]
Pia mater
One of the meninges, the pia mater is the delicate innermost membrane enveloping the brain and spinal cord. It is known informally as the pia. * * * A delicate vasculated ...
pia-arachnitis
SYN: leptomeningitis.
pia-arachnoid
SYN: leptomeninx.
pial
Relating to the pia mater.
pian
SYN: yaws. - p. bois a form of New World cutaneous leishmaniasis caused by Leishmania braziliensis guyanensis in the Amazon delta; a small proportion of cases are said to ...
Pianist’s cramp
A dystonia that affects the muscles of the hand and sometimes the forearm and only occurs when playing the piano (or another keyboard instrument such as the harpsichord). Similar ...
piarachnoid
SYN: leptomeninx.
piblokto, pibloktog
A hysterical dissociative state, usually occurring in Innit women, in which the individual screams, tears off clothes, and runs out into the snow; afterward, there is no memory ...
Pica
A craving for something not normally regarded as nutritive. For example, dirt. Pica is a classic clue to iron deficiency in children. It also occurs in zinc deficiency. Pica is ...
Picchini
Luigi, late 19th century Italian physician. See P. syndrome.
Pick
Arnold, Czechoslovakian psychiatrist, 1851–1924. See P. atrophy, P. bundle, P. disease. Friedel, German physician, 1867–1926. See P. bodies, under body, P. disease, P. ...
Pick disease
A form of dementia characterized by a slowly progressive deterioration of social skills and changes in personality leading to impairment of intellect, memory, and language. ...
Pickles
William, British general practitioner, researcher in transmission of infections in isolated communities, 1885–1969. See P. chart.
pickling
In dentistry, the process of cleansing metallic surfaces of the products of oxidation and other impurities by immersion in acid.
Pickwickian syndrome
The combination of obesity, somnolence (sleepiness), hypoventilation (underbreathing), and plethoric (red) face. The syndrome is so named because of the "fat and red-faced boy ...
Pickworth
Frederick A., *1889. See Lepehne-P. stain.
pico-
1. Combining form meaning small. 2. (p) Prefix used in the SI and metric system to signify submultiples of one-trillionth (10−12). SYN: bicro-. [It. piccolo]
picogram
One-trillionth of a gram.
picokatal
One trillionth of a katal (10−12 katal).
picolinic acid
Pyridine-4-carboxylic acid; an isomer of nicotinic acid.
picolinuric acid
N-Picolinoylglycine; the amide, with glycine, of picolinic acid; a hippuric acid analog in which picolinic acid, rather than benzoic acid, is conjugated with glycine and ...
picometer
One-trillionth of a meter. SYN: bicron.
picomole
One-trillionth of a mole (10−12 mol).
Picornaviridae
A family of very small (20–30 nm) ether-resistant, nonenveloped viruses having a core of positive sense single-stranded infectious RNA enclosed in a capsid of icosahedral ...
picornavirus
A virus of the family Picornaviridae.
picramic acid
Red crystals sometimes found in the blood of persons poisoned with picric acid; the crystals are formed as a result of partial reduction of picric acid.
Picrasma
See quassia. [L., fr. G. pikrasmos, bitterness]
picrate
A salt of picric acid.
picric acid
Has been used as an application in burns, eczema, erysipelas, and pruritus. SYN: carbazotic acid, nitroxanthic acid. [G. pikros, bitter]
picrocarmine
See p. stain.
picroformol
See p. fixative.
picronigrosin
See p. stain.
picrotoxin
A very bitter neutral principle derived from the fruit of Anamirta cocculus (family Menispermaceae); a central nervous system stimulant, used as an antidote for poisoning by ...
picrotoxinin
A lactone breakdown product of picrotoxin; pharmacologic properties resemble those of picrotoxin.
picryl
The organic radical derived from picric acid by removal of the hydroxyl group.
pictograph
A vision test chart for illiterates.
PID
Abbreviation for pelvic inflammatory disease.
PID (pelvic inflammatory disease)
Despite its seeming lack of gender, this term is applied to women only. PID refers exclusively to ascending infection of the female upper genital tract (the female structures ...
Pidgin Sign English
A system of communication that is a manual representation of English in which American Sign Language signs are used in English word order; there are no inflectional signs, and ...
piebaldism
Patchy absence of the pigment of scalp hair, giving a streaked appearance; patches of vitiligo may be present in other areas due to absence of melanocytes; often transmitted as ...
piebaldness
SYN: piebaldism.
piece
A part or portion. - end p. a part of the spermatozoon consisting of an axoneme surrounded only by the flagellar membrane. - Fab p. SYN: Fab fragment. - Fc p. SYN: Fc ...
piedra
A fungus disease of the hair characterized by the formation of numerous waxy, small, firm, nodular masses on the hair shaft. SEE ALSO: trichosporosis. [Sp. a stone] - black p. p. ...
Piedraia
A genus of fungi, based on P. hortae, which is probably the only species and which causes black piedra. [see piedra]
pieds terminaux
SYN: axon terminals, under terminal. [Fr., end feet]
Piercing
Using a sharp instrument, usually a needle, to make a temporary or permanent hole through an earlobe or other body part. Humans have practiced piercing for body decoration since ...
Pierini
Luigi, 20th century Argentinian dermatologist. See atrophoderma of Pasini and P..
Pierre Robin
See Robin.
piesimeter, piesometer
An instrument for measuring the pressure of a gas or a fluid. SYN: piezometer. [G. piesis, pressure] - Hales p. a glass tube inserted into an artery at right angles to its axis, ...
piesis
SYN: blood pressure. [G. pressure]
piezochemistry
The study of the effect of very high pressures on chemical reactions.
piezoelectric
Pertaining to piezoelectricity.
piezoelectricity
Electric currents generated by pressure upon certain crystals, e.g., quartz, mica, calcite. [G. piezo, to press, squeeze, + electricity]
piezogenic
Resulting from pressure. [G. piezo, to press, squeeze, + genesis, origin]
piezometer
SYN: piesimeter.
pig
A container, usually made of lead, used for shielding vials or syringes containing radioactive materials. [ jargon]
pigbel
A type of necrotizing enteritis endemic in the Papua New Guinea highlands caused by the B toxin of Clostridium perfringens type C; occurs predominantly in children because of ...
Pigment
: A substance that gives color to tissue. Pigments are responsible for the color of skin, eyes, and hair. * * * 1. Any coloring matter, as that of the red blood cells, hair, ...
pigmentary
Relating to a pigment.
Pigmentation
The coloring of the skin, hair, mucous membranes, and retina of the eye. Pigmentation is due to the deposition of melanin which is a coloring matter. The melanin is produced by ...
pigmented
Colored as the result of a deposit of pigment.
pigmentolysin
An antibody causing destruction of pigment. [L. pigmentum, pigment, + G. lysis, a loosening]
pigmentum nigrum
Melanin of the choroid coat of the eye.
pigmy
SYN: pygmy.
Pignet
Maurice-C.J., French surgeon, *1871. See P. formula.
pilar, pilary
SYN: hairy. [L. pilus, hair]
pile
1. A series of plates of two different metals imposed alternately one on the other, separated by a sheet of material moistened with a dilute acid solution, used to produce a ...
piles
SYN: hemorrhoids. [L. pila, a ball]
pileus
SYN: greater omentum. [L. pileum or p., a felt cap]
pili
Plural of pilus. [L.]
pilimiction
Passage of hairs in the urine, as in cases of dermoid tumors, or of threads of mucus in the urine. [L. pilus, hair, + mictio, urination]
pilin
The protein component of bacterial adhesive appendages that help the bacterium to stick to tissue or container surfaces, often the glycoproteins on the surface of eukaryotic ...
pill
1. A small globular mass of some coherent, but soluble, substance containing a medicinal substance to be swallowed. SEE ALSO: tablet. 2. The P.; a colloquial term for oral ...
pill mass
SYN: pilular mass.
Pill, the
Commonly called "the pill," combined oral contraceptives are the most commonly used form of reversible birth control in the United States. This form of birth control ...
pill-rolling
A circular movement of the opposed tips of the thumb and the index finger appearing as a form of tremor in paralysis agitans.
pillar
A structure or part having a resemblance to a column or p.. [L. pila] - anterior p. of fauces palatoglossal arch. - anterior p. of fornix SYN: column of fornix. - Corti ...
pillet
A small pill.
pilo-
Hair. [L. pilus]
pilocarpine
An alkaloid obtained from the leaves of Pilocarpus; Microphyllus or P. jaborandi (family Rutaceae), shrubs of the West Indies and tropical America; a parasympathomimetic agent ...
pilocarpus
A genus of trees and shrubs found in Central and South America and in the West Indies. Constitutes the botanical source for pilocarpine, an alkaloid that activates cholinergic ...
pilocystic
Denoting a dermoid cyst containing hair. [ pilo- + G. kystis, bladder]
Piloerection
Erection of the hair of the skin. Piloerection of the hair, for example, on the arm makes it "stand on end." Piloerection starts when a stimulus such as cold or fright causes a ...
piloid
Hairlike; resembling hair. [ pilo- + G. eidos, resemblance]
pilomatrixoma
A benign solitary hair follicle tumor, often starting in childhood, containing cells resembling basal cell carcinoma and areas of epithelial necrosis forming eosinophilic ghost ...
pilomotor
Moving the hair; denoting the arrectores pilorum muscles of the skin and the postganglionic sympathetic nerve fibers innervating these small smooth muscles. [ pilo- + L. motor, ...
pilonidal
Denoting the presence of hair in a dermoid cyst or in a sinus opening on the skin. [ pilo- + L. nidus, nest]
Pilonidal cyst
A special kind of abscess that occurs in the cleft between the buttocks. Forms frequently in adolescence after long trips that involve sitting.
pilose
SYN: hairy. [L. pilosus]
pilosebaceous
Relating to the hair follicles and sebaceous glands. [ pilo- + L. sebum, suet]
pilosis
SYN: hirsutism. [ pilo- + G. -osis, condition]
Piltz
Jan, Polish neurologist, 1870–1931. See P. sign, Westphal-P. phenomenon.
pilula
A pill or pilule. [L. dim. of pila, a ball]
pilular
Relating to a pill.
pilule
A small pill. [L. pilula]
pilus
1. [TA] SYN: hair (1). 2. A fine filamentous appendage, somewhat analogous to the flagelium, that occurs on some bacteria. Pili consist only of protein and are shorter, ...
pimaricin
An antifungal antibiotic for topical use, produced by Streptomyces natalensis; effective against Aspergillus, Candida, and Mucor species. SYN: natamycin.
pimelic acid
Heptanedioic acid; an intermediate in the oxidation of oleic acid in some microorganisms; a precursor of biotin.
pimelo-
Fat, fatty. [G. pimele, soft fat, lard, fr. piar, fat]
pimelorrhea
SYN: fatty diarrhea. [ pimelo- + G. rhoia, a flux]
pimelorthopnea
Orthopnea; difficulty breathing in any but the erect posture, due to obesity. SYN: piorthopnea. [ pimelo- + G. orthos, straight, + pnoe, breath]
pimenta, pimento
The dried fruit of P. officinalis (family Myrtaceae), a tree native in Jamaica and other parts of tropical America, used as a carminative and aromatic spice; p. oil comprises 3 ...
pimozide
A tranquilizing antipsychotic drug.
pimple
A papule or small pustule; usually meant to denote an inflammatory lesion of acne.
Pimples
Oil (sebaceous) glands infected with bacteria, resulting in an inflamed area with pus formation. Pimples are due to overactivity of the oil glands located at the base of the hair ...
PIN
Abbreviation for prostatic intraepithelial neoplasia.
pin
A metallic implant used in surgical treatment of bone fractures. SEE ALSO: nail. [O.E. pinn, fr. L. pinna, feather] - Steinmann p. a p. that is used to transfix bone for ...
pinacyanol
A basic dye, used as a color sensitizer (violet red in water, blue in alcohol) in photography and for vital staining of leukocytes.
Pinard
Adolphe, French obstetrician, 1844–1934. See P. maneuver.
pincement
A pinching manipulation in massage. [Fr. pinching]
pinch
occupational therapy Grip between fingers at the most distal joints.
Pindborg
Jens J., Danish oral pathologist, 1921–1995. See P. tumor.
pindolol
A β-adrenergic blocking agent used in the treatment of hypertension; also possesses intrinsic sympathomimetic activity.
pine
An evergreen coniferous tree of the genus Pinus (family Pinaceae), various species of which yield tar, turpentine, resin, and volatile oils. [L. pinus, a p. tree] - p.-needle ...
pineal
1. Shaped like a pine cone. SYN: piniform. 2. Pertaining to the p. body. [L. pineus, relating to the pine, pinus]
Pineal gland
A small gland located deep within in the brain. It is believed to secrete melatonin, and may therefore be part of the body’s sleep-regulation apparatus.
Pineal region tumor
: A brain tumor on or near the pineal gland. There are at least 17 types of pineal gland tumors, most of which are not cancerous but can nonetheless cause extreme distress. ...
pinealectomy
Removal of the pineal body. [ pineal + G. ektome, excision]
pinealocyte
A cell of the pineal body with long processes ending in bulbous expansions. Pinealocytes receive a direct innervation from sympathetic neurons that form recognizable synapses. ...
pinealoma
A term that has been variably used to designate germ cell tumors, pineocytomas, and pineoblastomas of the pineal gland. [ pineal + G. -oma, tumor] - ectopic p. an obsolete term ...
pinealopathy
Disease of the pineal gland. [ pineal + G. pathos, disease]
pineapple
The fruit of Ananas sativa or Bromelia ananas (family Bromeliaceae); it contains a proteolytic and milk-clotting enzyme, bromelain.
Pinel
Philippe, French psychiatrist, 1745–1826. See P. system.
Pinel system
The policy of treating the mentally ill in hospitals and other institutions humanely and without the use of forcible restraints of any type. Named for the great French ...
pineoblastoma
A poorly differentiated tumor of the pineal gland most frequently occurring in the first three decades of life consisting of small cells with a scant amount of cytoplasm and ...
pineocytoma
A tumor arising in the pineal gland that resembles normal pineal parenchyma.
ping-pong
See ping-pong mechanism. [Ping-Pong, trademark for table tennis]
Pinguecula
A yellow spot on the white of the eye, usually toward the inside (nose side) of the eye, associated with aging. It looks fatty (in Latin the word pinguiculus means fattish), and ...
pinguecula, pinguicula
A yellowish accumulation of connective tissue that thickens the conjunctiva; occurs in the aged. [L. pinguiculus, fattish, fr. pinguis, fat]
Pinguicula
Alternate spelling of pinguecula. Irrespective of spelling, the accent is on the second syllable which is pronounced gwek.
piniform
SYN: pineal (1). [L. pinus, pine, + forma, form]
Pinkeye
Also called conjunctivitis. Redness or irritation of the conjuctivae, the membranes on the inner part of the eyelids and the membranes covering the whites of the eyes. These ...
pinledge
A cast metal dental restoration or technique that employs parallel pins as part of the casting to increase retention of the restoration.
Pinna
The ear or, to be more precise, the part of the ear that projects like a little wing from the head. In Latin, pinna means wing. * * * 1. SYN: auricle (1). 2. A feather, wing, ...
pinnal
Relating to the pinna.
pinniped
A member of the suborder Pinnipedia, aquatic carnivorous mammals with all four limbs modified into flippers ( e.g., seal, walrus). [L. pinna, feather (wing), + pes (ped-), ...
pinocyte
A cell that exhibits pinocytosis. [G. pineo, to drink, + kytos, cell]
Pinocytosis
A cellular process that permits the active transport of fluid from outside the cell through the membrane surrounding the cell into the inside of the cell. In pinocytosis, tiny ...
Pinosome
A tiny fluid-filled vesicle (bubble) within a cell. Pinosomes are created in the process of pinocytosis in which tiny incuppings called caveolae (little caves) in the surface of ...
Pins
Emil, Austrian physician, 1845–1913. See P. sign, P. syndrome.
pint
A measure of quantity (U.S. liquid), containing 16 fluid ounces, 28.875 cubic inches; 473.1765 cc. An imperial p. contains 20 British fluid ounces, 34.67743 cubic inches; 568.2615 ...
pinta
A disease caused by a spirochete, Treponema carateum, endemic in Mexico and Central America, and characterized by a small primary papule followed by an enlarging plaque and ...
pintids
Eruptions of plaque-like lesions in the secondary phase of pinta; the lesions, which vary in color ( hypochromic, hyperchromic, and erythematosquamous), result in ...
pinus
SYN: pineal body. [L. a pine tree]
pinworm
A member of the genus Enterobius or related genera of nematodes in the family Oxyuridae, abundant in a large variety of vertebrates, including such species as Oxyuris equi (the ...
Pinworm infection
An infection caused by a small, white intestinal worm: the pinworm or, more formally, Enterobius vermicularis. The pinworm is about the length of a staple and lives for the ...
Piophila casei
The cheese fly, a species of muscoid flies whose eggs are deposited on exposed cheese, cured meats, and other foods and are thus ingested, sometimes giving rise to temporary ...
piorthopnea
SYN: pimelorthopnea. [G. pion, fat, + orthos, straight, + pnoe, breath]
PIP2
Abbreviation for phosphatidylinositol 4,5-bisphosphate.
pipamazine
A phenothiazine analogue with antiemetic and tranquilizing properties.
pipamperone
An antipsychotic tranquilizer.
pipazethate
An antitussive agent.
pipecolic acid
Dihydrobaikiaine; 2-piperidinecarboxylic acid; saturated picolinic acid; the l-isomers of the Δ1- and Δ6-dehydropipecolic acids are intermediates in the catabolism of ...
pipecolinic acid
SYN: pipecolic acid.
pipecuronium
A nondepolarizing steroid muscle relaxant structurally related to pancuronium and characterized by long duration of action.
pipecuronium bromide
A neuromuscular blocking agent with nondepolarizing properties, thus resembling d-tubocurarine but having a shorter duration of paralytic action.
pipenzolate methylbromide
An anticholinergic drug.
Piper
E.B., U.S. obstetrician-gynecologist, 1881–1935. See P. forceps.
piper
Black pepper, the dried unripe fruit of P. nigrum (family Piperaceae), a climbing plant of the East Indies; used as a condiment, diaphoretic, stimulant, and carminative, and ...
piperacillin sodium
A semisynthetic extended spectrum penicillin active against a wide variety of Gram-positive and Gram-negative bacteria.
piperazine
Its former use in gout was based upon its property of dissolving uric acid in vitro, but it is ineffective in increasing uric acid excretion; its compounds are now used as ...
piperazine diethanesulfonic acid
One of several aminosulfonic acids (like HEPES) used in biologic buffers; active range, 6.0–8.5.
piperidine
1. Hexahydropyridine; a compound from which are derived phenothiazine antipsychotics such as thioridazine hydrochloride and mesoridazine besylate. 2. One of a class of ...
piperidolate hydrochloride
An anticholinergic agent.
piperocaine hydrochloride
A rapidly acting local anesthetic for infiltration and nerve blocks.
piperoxan hydrochloride
An adrenergic (α-receptor blocking agent of the Fourneau series of benzodioxanes); used as a diagnostic test for pheochromocytoma. SYN: Fourneau 933.
PIPES
Abbreviation for piperazine diethanesulfonic acid.
pipette, pipet
A graduated tube (marked in mL) used to transport a definite volume of a gas or liquid in laboratory work. [Fr. dim. of pipe, pipe] - blowout p. a p. calibrated to deliver its ...
pipobroman
An alkylating agent used in polycythemia vera and chronic granulocytic leukemia.
piposulfan
An antineoplastic agent.
pipradrol hydrochloride
A central nervous system stimulant.
piprinhydrinate
An antihistaminic and antiemetic.
pipsyl
p-Iodophenylsulfonyl, the radical of p. chloride that combines with the amino groups of amino acid s and proteins.
pirbuterol
A selective β2-adrenergic bronchodilator used to treat bronchospasm in asthma or chronic obstructive lung disease.
Pirenella
A genus of marine and brackish water operculate (prosobranch) snails. P. conica is the initial intermediate host of Heterophyes heterophyes, the fish-borne fluke of humans and ...
pirenzepine
An anticholinergic agent exhibiting relative specificity for suppression of gastric hydrochloric acid secretion; relatively free of anticholinergic side effect s; used in the ...
piretanide
High ceiling loop diuretic similar to bumetanide and furosemide; used as a diuretic in hypertension and congestive heart failure.
piribedil
An agent that stimulates dopamine receptors in the brain and also exerts a peripheral vasodilator effect.
Pirie
George A., Scottish radiologist, 1864–1929. See P. bone.
piriform
Pear-shaped. SYN: pyriform. [L. pirum, pear, + forma, form]
Piriformis muscle
A muscle that begins at the front surface of the sacrum (the V-shaped bone between the buttocks at the base of the spine) and passes through the greater sciatic notch to attach ...
Piriformis syndrome
Irritation of the sciatic nerve caused by compression of the nerve within the buttock by the piriformis muscle. Typically, the pain of the piriformis syndrome is increased by ...
Pirogoff
Nikolai I., Russian surgeon, 1810–1881. See P. amputation, P. angle, P. triangle.
piromen
A sterile, nonprotein, nonanaphylactogenic extract of Pseudomonas aeruginosa and Proteus vulgaris. The active components are bacterial polysaccharides of low toxicity; used ...
Piroplasma
Former name for Babesia. [L. pirum, pear, + G. plasma, a thing formed]
Piroplasmida
An order of sporozoan protozoa ( subclass Piroplasmia, class Sporozoea) consisting of the families Habesiidae, Theileriidae, and Dactylosomatidae; includes heteroxenous ...
piroplasmosis
SYN: babesiosis.
piroxicam olamine
A long-acting nonsteroidal anti-inflammatory agent with analgesic and antipyretic actions.
pirprofen
An anti-inflammatory agent used in the treatment of rheumatoid arthritis.
Pirquet von Cesenatico
Clemens P., Austrian physician, 1874–1929. See Pirquet reaction, Pirquet test.
Pisa syndrome
A condition in which there is sustained involuntary flexion of the body and head to one side and slight rotation of the trunk so the person appears to lean like the Leaning Tower ...
Pisces
A superclass of vertebrates, generally known as fish; the term is sometimes confined to the bony fishes. [L. pl. of piscis, a fish]
pisiform
Pea-shaped or pea-sized. [L. pisum, pea, + forma, appearance]
pit
1. SYN: fovea. 2. One of the pinhead-sized depressed scars following the pustule of acne, chickenpox, or smallpox (pockmark). 3. A sharp-pointed depression in the enamel ...
Pit, ear
Tiny pit in front of the ear. Also preauricular pit. A minor anomaly of no great consequence in itself. More common in blacks than whites and in females than males. Can recur ...
pit-1
A nuclear binding transcriptional factor found in many cells in normal human pituitary glands and expressed in a large percentage of pituitary adenomas, in particular those ...
PITC
Abbreviation for phenylisothiocyanate.
pitch
A resinous substance obtained from tar after the volatile substances have been expelled by boiling. SYN: pix. [L. pix] - Burgundy p. a resinous exudation from the spruce fir or ...

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