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Tooth and nail syndrome
A genetic disorder characterized by the absence of several teeth at birth and abnormalities of the nails. The disorder is also known as hypodontia and nail dysgenesis or Witkop ...
Tooth erosion
Tooth erosion is a gradual loss of the normally hard surface of the tooth due to chemical, not bacterial, processes. Erosion is an eating away of a surface. The word " erosion" ...
Tooth root
The lower two-thirds of a tooth. The roots are normally buried in bone, and serve to anchor the tooth in position. They are covered with a thin layer of bone, and insert into ...
Tooth root sensitivities
Oversensitivity of exposed roots of teeth to cold, hot, and sour foods because those roots are no longer protected by healthy gum and bone. Chronic gum disease contributes to ...
Tooth, cracked, syndrome
A toothache caused by a broken tooth (tooth fracture) without associated cavity or advanced gum disease. Biting on the area of tooth fracture can cause severe sharp pains. These ...
Tooth, wisdom
Large molars in the very back of the jaw. The human jaw has changed in size over the course of evolution, but these teeth continue to erupt in many individuals. If the jaw is too ...
tooth-borne
A term used to describe a prosthesis or part of a prosthesis which depends entirely upon the abutment teeth for support.
toothache
Pain in a tooth due to the condition of the pulp or periodontal ligament resulting from caries, infection, or trauma. SYN: dentalgia, odontalgia, odontodynia.
top-
See topo-.
topagnosis
Inability to localize tactile sensations. SYN: topoanesthesia. [ top- + G. a- priv. + gnosis, recognition]
topesthesia
The ability to localize a light touch applied to any part of the skin. [ top- + G. aisthesis, sensation]
tophaceous
Sandy; gritty; pertaining to or manifesting the features of a tophus. [L. tophaceus]
Tophaceous gout
A chronic form of gout. Nodular masses of uric acid crystals (tophi) are deposited in different soft tissue areas of the body. Even though tophi are most commonly found as hard ...
tophi
Plural of tophus.
Tophus
A nodular mass of uric acid crystals. Tophi are characteristically deposited in different soft tissue areas of the body in gout. The word tophus comes via Latin from the Greek ...
topica
Remedies for local external use. [neut. pl. of Mod. L. topicus, local]
Topical
Pertaining to a particular surface area. A topical agent is applied to a certain area of the skin and is intended to affect only the area to which it is applied. Whether its ...
Topical chemotherapy
Treatment with an anticancer drug in a lotion, ointment or cream that is applied to the
Topinard
Paul, French anthropologist, 1830–1911. See T. facial angle, T. line.
topistic
Denoting an anatomically defined region in the nervous system. [G. topos, place]
topo-, top-
Place, topical. [G. topos]
topoanesthesia
SYN: topagnosis. [topo- + anesthesia]
topognosis, topognosia
Recognition of the location of a sensation; in the case of touch, topesthesia. [topo- + G. gnosis, knowledge]
topogometer
A movable fixation target attached to the front of a keratometer, used in fitting contact lenses to measure the curvatures of the cornea in its peripheral zones. [topo- + G. ...
topography
In anatomy, the description of any part of the body, especially in relation to a definite and limited area of the surface. [topo- + G. graphe, a writing]
topoisomerase
A type of enzyme converting (isomerizing) one topological version of DNA into another; acts by catalyzing the breakage and reformation of DNA phosphodiester linkages. [topo- + ...
Topolanski
Alfred, Austrian ophthalmologist, 1861–1960. See T. sign.
topology
1. SYN: regional anatomy. 2. The study of the dimensions of personality. [topo- + G. logos, study]
toponarcosis
A localized cutaneous anesthesia. [topo- + narcosis]
toponym
A regional term; one designating a region as distinguished from the name of a structure, system, or organ. [topo- + G. onyma, name]
toponymy
Topical or regional nomenclature, as distinguished from organonymy. [topo- + G. onyma, name]
topopathogenesis
Topography of lesions related to their pathogenesis. [topo- + pathogenesis]
topophobia
A neurotic dread of or related to a particular place or locality. [topo- + G. phobos, fear]
topophylaxis
Prevention of arsphenamine shock by a tourniquet applied to the limb above the site of injection and its slow release five or six minutes later. [topo- + G. phylaxis, ...
topotecan
A topoisomerase I inhibitor with antitumor activity used in the treatment of ovarian cancer.
TORCH
Acronym for toxoplasmosis, other infections, rubella, cytomegalovirus infection, and herpes simplex. See T. syndrome.
TORCH screen
Screening test for a group of infections known by the acronym TORCH which stands for Toxoplasma gondii; other viruses (HIV, measles, and more); rubella (German ...
Torek
Franz J.A., U.S. surgeon, 1861–1938. See T. operation.
toric
Relating to, or having the curvature of, a torus.
Torkildsen
Arne, Norwegian neurosurgeon, 1899–1968. See T. shunt.
Tornado 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 ...
Tornwaldt
Gustavus Ludwig, German physician, 1843–1910. See T. abscess, T. cyst, T. disease, T. syndrome.
torose, torous
Bulging; knobby. [L. torosus, fleshy, fr. torus, a knot, bulge]
Torovirus
A genus in the family Coronaviridae that causes enteric infections in animals.
torpent
1. SYN: torpid. 2. A benumbing agent. [L. torpeo, pres. p. -ens, to be sluggish]
torpid
Inactive; sluggish. SYN: torpent (1). [L. torpidus, fr. torpeo, to be sluggish]
torpidity
SYN: torpor.
torpor
Inactivity, sluggishness. SYN: torpidity. [L. sluggishness, numbness]
torque
1. A rotatory force. 2. In dentistry, a torsion force applied to a tooth to produce or maintain crown or root movement. [L. torqueo, to twist]
torr
A unit of pressure sufficient to support a 1-mm column of mercury at 0°C against the standard acceleration of gravity at 45° north latitude (980.621 cm/s2); equivalent to ...
Torre
Douglas P., U.S. dermatologist, *1919. See T. syndrome, Muir-T. syndrome.
torrefaction
Parching or drying by heat; a pharmaceutical operation for rendering drugs friable. [L. torre-facio, pp. -factus, to make dry by heat, fr. torreo, to parch]
torrefy
To parch.
Torricelli
Evangelista, Italian scientist, 1608–1647. See torr.
torsade de pointes
“Twisting of the points,” a form of ventricular tachycardia nearly always due to medications and characterized by a long QT interval and a “short-long-short” sequence in ...
torsion
1. A twisting or rotation of a part upon its long axis or on its mesentery; often associated with compromise of the blood supply. 2. Twisting of the cut end of an artery to ...
Torsion dystonia
A form of dystonia known as early-onset torsion dystonia (also called idiopathic or generalized torsion dystonia) that begins in childhood around the age of 12. Symptoms ...
Torsion fracture
A fracture, also called a spiral fracture, in which a bone has been twisted apart. A fracture is any break in the bone or cartilage. It usually is a result of trauma but can be ...
torsionometer
A device for measuring the degree of rotation of the spinal column.
torsiversion
A malposition of a tooth in which it is rotated on its long axis. SYN: torsive occlusion, torsoclusion (2).
torso
The trunk; the body without relation to head or extremities. [It.]
torsoclusion
1. Obsolete term for acupressure performed by entering a needle in the tissues parallel with the artery, then turning it so that it crosses the artery transversely, and passing ...
torticollar
Relating to or marked by torticollis.
Torticollis
The most common of the focal dystonias, torticollis is a state of excessive of inadequate muscle tone in the muscles in the neck that control the position of the head. It can ...
Torticollis, congenital
A deformity of the neck that is evident at birth. It is due to shortening of the neck muscles. Congenital torticollis tilts the head to the side on which the neck muscles are ...
Torticollis, spasmodic
Spasmodic torticollis, or torticollis, is the most common of the focal dystonias. In torticollis, the muscles in the neck that control the position of the head are affected, ...
tortipelvis
Twisted pelvis.
tortuous
Having many curves; full of turns and twists. [L. tortuosus, fr. torqueo, to twist]
Torulopsis
A genus of yeasts with smaller blastoconidia (2–4 nm) with a wide attachment to the parent cell; T. glabrata, now called Candida glabrata, is a cause of candidiasis in humans.
torulus
A minute elevation or papilla. [L. dim. of torus, a protuberance, swelling] - toruli tactiles [TA] SYN: tactile elevations, under elevation.
torus
1. [TA] A rounded swelling, such as that caused by a contracting muscle. SYN: elevation [TA]. 2. A geometric figure formed by the revolution of a circle around the base of any ...
TOS
Abbreviation for thoracic outlet syndrome.
tosyl
Toluenesulfonyl radical, widely used to block amino groups in the course of organic syntheses of drugs and other biologically active compounds.
tosylate
USAN-approved contraction for p-toluenesulfonate.
Total hip replacement
Surgery in which the diseased ball and socket of the hip joint are completely removed and replaced with artificial materials. A metal ball with a stem (a prosthesis) is inserted ...
Total knee replacement
A surgical procedure in which damaged parts of the knee joint are replaced with artifical parts. The surgery is done by separating the muscles and ligaments around the knee to ...
Total parenteral nutrition
Intravenous feeding that provides a patient with all of the fluid and the essential nutrients they need when they are unable to feed themselves by mouth. Often referred to by its ...
totem
An object (usually an animal or plant) serving as the emblem of a family or clan and often as a reminder of its ancestry; something that serves as a revered symbol. [Amer. Indian]
totemism
Belief in a kinship with, or a mystical relationship between, a group or individual and a totem.
totemistic
Relating to totemism.
totipotency, totipotence
The ability of a cell to differentiate into any type of cell and thus form a new organism or regenerate any part of an organism; e.g., a fertilized ovum, or a small excised ...
Totipotent
Having unlimited capability. A totipotent cell has the capacity to form an entire organism. Human development begins when a sperm fertilizes an egg and creates a single totipotent ...
totipotent, totipotential
Relating to totipotency.
touch
1. The sense by which slight contact with the skin or mucous membrane is appreciated. SYN: tactile sense. 2. Digital examination. [Fr. toucher] - royal t. a touching of a ...
Toupet
A., French surgeon. See T. fundoplication.
Tourette
See Gilles de la T..
Tourette syndrome
A tic disorder characterized by the presence of chronic vocal and motor tics, probably based on differences in or damage to the basal ganglia of the brain. Tourette syndrome ...
Tournay
Auguste, French ophthalmologist, 1878–1969. See T. sign.
tourniquet
An instrument for temporarily arresting the flow of blood to or from a distal part by pressure applied with an encircling device. [Fr. fr. tourner, to turn] - Dupuytren t. an ...
Tourtual
Kaspar, Prussian anatomist, 1802–1865. See T. membrane, T. sinus.
Touton
Karl, German dermatologist, *1858. See T. giant cell.
Tovell
Ralph M., U.S. anesthesiologist, 1901–1967. See T. tube.
Towne
E.B., U.S. otolaryngologist, 1883–1957. See T. projection, T. projection radiograph, T. view.
tox-
See toxico-.
toxalbumins
Phytotoxins that inhibit protein synthesis.
toxanemia
Anemia resulting from the effects of a hemolytic poison. [G. toxikon, poison, + anemia]
toxaphene
A chlorinated hydrocarbon insecticide.
Toxascaris leonina
An ascarid nematode of the dog that differs from Toxocara in that the larvae do not migrate through the lungs; the entire developmental cycle occurs in the gut. This parasite ...
Toxemia
A condition in pregnancy, also known as pre-eclampsia (or preeclampsia) characterized by abrupt hypertension (a sharp rise in blood pressure), albuminuria (leakage of large ...
toxemic
Pertaining to, affected by, or manifesting the features of toxemia.
toxi-
See toxico-.
toxic
1. SYN: poisonous. 2. Pertaining to a toxin. [G. toxikon, an arrow-poison]
Toxic goiter, diffuse
Graves disease, the most common cause of hyperthyroidism (overactivity of the thyroid gland), with generalized diffuse overactivity ("toxicity") of the entire thyroid gland which ...
Toxic hepatitis
Hepatitis (inflammation of the liver) caused by an industrial chemical such as carbon tetrachloride or phosphorus.
Toxic shock
See Toxic shock syndrome.
Toxic shock syndrome
A grave condition occurring predominantly in menstruating women using tampons, toxic shock is characterized by a highly toxic state (with sudden high fever, vomiting, diarrhea, ...
toxicant
1. SYN: poisonous. 2. Any poisonous agent, specifically an alcoholic or other poison, causing symptoms of what is popularly called intoxication.
toxicemia
SYN: toxemia.
toxicity
The state of being poisonous. - oxygen t. 1. a body disturbance resulting from breathing high partial pressures of oxygen; characterized by visual and hearing abnormalities, ...
toxico-, tox-, toxi-, toxo-
Poison, toxin. [G. toxikon, bow, hence (arrow) poison]
Toxicodendron
A genus of poisonous plants (family Anacardiaceae), also known as Rhus, with smooth fruits and foliage that contain urushiol, which produces a contact dermatitis (rhus ...
toxicogenic
1. Producing a poison. 2. Caused by a poison. [toxico- + G. -gen, producing]
toxicoid
Having an action like that of a poison; temporarily poisonous. [toxico- + G. eidos, resemblance]
toxicologic
Relating to toxicology.
toxicologist
A specialist or expert in toxicology.
toxicology
The science of poisons, including their source, chemical composition, action, tests, and antidotes. [toxico- + G. logos, study]
toxicopathic
Denoting any morbid state caused by the action of a poison.
toxicophobia
Morbid fear of being poisoned. SYN: toxiphobia. [toxico- + G. phobos, fear]
toxicosis
Any disease of toxic origin. SYN: systemic poisoning. [toxico- + G. -osis, condition] - endogenic t. SYN: autointoxication. - exogenic t. any disease caused by a poison ...
toxiferines
The most potent group of the curare alkaloids; the principal source is Strychnos toxifera.
toxiferous
SYN: poisonous. [ toxi- + L. fero, to bear]
toxigenic
SYN: toxinogenic.
toxigenicity
SYN: toxinogenicity.
toxilic acid
SYN: maleic acid.
Toxin
One of a number of poisons produced by certain plants, animals, and bacteria. The term "toxin" is frequently used to refer specifically to a particular protein produced by some ...
toxinic
Relating to a toxin.
toxinogenic
Producing a toxin, said of an organism. SYN: toxigenic. [toxin + G. -gen, producing]
toxinogenicity
The capacity to produce toxin. SYN: toxigenicity.
toxinology
The study of toxins, in a restricted sense, with reference to the relatively unstable proteinaceous substances of microbial, plant, or animal origins. [toxin + G. logos, study]
toxinosis
Any disease or lesion caused by the action of a toxin. SYN: toxonosis. [toxin + G. -osis, condition]
toxiphobia
SYN: toxicophobia.
toxisterol
A toxic substance formed by excessive irradiation of ergosterol or calciferol.
Toxo (toxoplasmosis)
An infection caused by a single-celled parasite named Toxoplasma gondii that may invade tissues and damage the brain, especially of the fetus and newborn. The parasite ...
toxo-
See toxico-.
Toxocara
A genus of ascarid nematodes, chiefly found in carnivores, that cause toxocariasis. [G. toxon, bow, + kara, head] - T. canis the common ascarid species in the small intestine ...
toxocariasis
Infection with nematodes of the genus Toxocara; parenterally migrating larvae, chiefly of Toxocara canis, may cause visceral larva migrans; ocular involvement results in either ...
toxoid
A toxin that has been treated (commonly with formaldehyde) so as to destroy its toxic property but retain its antigenicity, i.e., its capability of stimulating the production of ...
toxon, toxone
A hypothetical bacterial product, of feeble toxicity and weak affinity for antitoxin.
toxoneme
SYN: rhoptry. [G. toxon, bow, + nema, thread]
toxonosis
SYN: toxinosis. [ toxo- + G. nosos, disease]
toxophil, toxophile
Susceptible to the action of a poison; having an affinity for toxins. [ toxo- + G. philos, fond]
toxophore
Denoting the atomic group of the toxin molecule which carries the poisonous principle. [ toxo- + G. phoros, bearing]
toxophorous
Relating to the toxophore group of the toxin molecule.
Toxoplasma gondii
A single-celled parasite that causes toxoplasmosis (toxo) . Toxoplasma gondii is very common (more than 60 million people in the US carry it) but few are aware of it because the ...
Toxoplasmatidae
A family of coccidian sporozoa including the genera Toxoplasma and Frankelia, characterized by endodyogeny and by the presence of cysts (sometimes termed pseudocysts) containing ...
toxoplasmosis
Disease caused by the protozoan parasite Toxoplasma gondii, which can produce abortion in sheep, encephalitis in mink, and a variety of syndromes in humans. Prenatally acquired ...
Toxoplasmosis (toxo)
An infection caused by a single-celled parasite named Toxoplasma gondii that may invade tissues and damage the brain, especially of the fetus and newborn. The parasite ...
toxopyrimidine
One of the products resulting from the hydrolysis of thiamin by thiaminase and appearing in the urine; a competitive inhibitor of pyridoxal. SYN: pyramin, pyramine.
Toynbee
Joseph, English otologist, 1815–1866. See T. corpuscles, under corpuscle, T. muscle, T. tube.
TPA, tPA
Abbreviation for tissue plasminogen activator.
TPN
Abbreviation for total parenteral nutrition.
TPP
Abbreviation for thiamin pyrophosphate.
trace
1. Evidence of the former existence, influence, or action of an object, phenomenon, or event. 2. An extremely small amount or barely discernible indication of something.
tracer
1. An element or compound containing atoms that can be distinguished from their normal counterparts by physical means ( e.g., radioactivity assay or mass spectrography) and ...
trache-
See tracheo-.
Trachea
The trachea is a tube-like portion of the breathing or "respiratory" tract that connects the "voice box" (larynx) with the bronchial parts of the lungs. The ...
tracheal
Relating to the trachea.
trachealgia
Pain in the trachea. [trachea + G. algos, pain]
trachealis
See t. (muscle).
tracheitis
Inflammation of the mucous membrane of the trachea. SYN: trachitis. [trachea + G. -itis, inflammation]
trachel-
See trachelo-.
trachelalis
Archaic term for longissimus capitis (muscle).
Trachelectomy
Surgical removal of the cervix, the lower portion of the uterus that protrudes into the vagina. Trachelectomy is done in younger women with early cancer of the cervix (with a ...
trachelematoma
A hematoma of the neck. [ trachel- + hematoma]
trachelian
Archaic term for cervical. [G. trachelos, neck]
trachelism, trachelismus
A bending backward of the neck, such as sometimes ushers in an epileptic attack. [G. trachelismos, a seizing by the throat]
trachelitis
SYN: cervicitis.
trachelo-, trachel-
Neck. [G. trachelos]
trachelo-occipitalis
Archaic term for semispinalis capitis (muscle).
trachelocele
SYN: tracheocele. [trachelo- + G. kele, tumor, hernia]
trachelomastoid
Archaic term for longissimus capitis (muscle).
trachelopanus
1. Swelling of the lymphatic vessels of the neck. 2. Lymphatic engorgement of the cervix uteri. [trachelo- + L. panus, tumor, swelling]
trachelopexia, trachelopexy
Surgical fixation of the cervix uteri. [trachelo- + G. pexis, fixation]
tracheloplasty
Rarely used term for plastic surgery of the cervix uteri. [trachelo- + G. plastos, formed]
trachelorrhaphy
Repair by suture of a laceration of the cervix uteri. SYN: Emmet operation. [trachelo- + G. rhaphe, suture]
trachelos
Archaic term for collum. [G. t.]
tracheloschisis
Congenital fissure in the neck. [trachelo- + G. schisis, fissure]
trachelotomy
SYN: cervicotomy. [trachelo- + G. tome, incision]
tracheo-, trache-
The trachea. [see trachea]
tracheoaerocele
An air cyst in the neck caused by distention of a tracheocele. [tracheo- + G. aer, air, + kele, hernia]
tracheobiliary
Relating to the trachea or bronchi and the biliary duct system.
tracheobroncheopathia osteoplastica
A benign submucoid tumor or series of tumors that ossify near the tracheal walls.
tracheobronchial
Relating to both trachea and bronchi, denoting especially a set of lymph node s.
tracheobronchitis
Inflammation of the mucous membrane of the trachea and bronchi.
tracheobronchomegaly
Gross widening of the trachea and main bronchi, usually congenital. SYN: Mounier-Kuhn syndrome. [tracheo- + bronchus + G. megas, large]
tracheobronchoscopy
Inspection of the interior of the trachea and bronchi. [tracheo- + bronchus, + G. skopeo, to view]
tracheocele
A protrusion of the mucous membrane through a defect in the wall of the trachea. SYN: trachelocele. [tracheo- + G. kele, hernia]
tracheoesophageal
Relating to the trachea and the esophagus.
Tracheoesophageal puncture
: A small opening made by a surgeon between the esophagus and the trachea. A valve keeps food out of the trachea but lets air into the esophagus for esophageal speech.
tracheolaryngeal
Relating to the trachea and the larynx.
tracheomalacia
Softening of the cartilages of the trachea. [tracheo- + G. malakia, softness]
tracheomegaly
An abnormally dilated trachea which may, like bronchiectasis, result from infection or prolonged positive pressure ventilation. [tracheo- + G. megas (megal-), large]
tracheopathia, tracheopathy
Any disease of the trachea. [tracheo- + G. pathos, disease] - t. osteoplastica a rare disease characterized by cartilaginous and bony growths in the trachea and bronchi that ...
tracheopharyngeal
Relating to both trachea and pharynx; denoting an occasional band of muscular fibers passing from the inferior constrictor of the pharynx to the trachea.
tracheophonesis
Auscultation of the heart sounds at the sternal notch. [tracheo- + G. phonesis, a sounding]
tracheophony
The hollow voice sound heard in auscultating over the trachea. SEE ALSO: bronchophony. [tracheo- + G. phone, voice]
tracheoplasty
Plastic surgery of the trachea. [tracheo- + G. plastos, formed] - slide t. an operation for the repair of long tracheal stenosis in which anterior and posterior sliding flaps of ...
tracheorrhagia
Hemorrhage from the mucous membrane of the trachea. [tracheo- + G. rhegnymi, to burst forth]
tracheoschisis
A fissure into the trachea. [tracheo- + G. schisis, fissure]
tracheoscope
An instrument used in tracheoscopy.
tracheoscopic
Relating to tracheoscopy.
tracheoscopy
Inspection of the interior of the trachea. [tracheo- + G. skopeo, to examine]
tracheostenosis
Narrowing of the lumen of the trachea. [tracheo- + G. stenosis, constriction]
tracheostoma
Permanent opening into the trachea through the neck; also the opening after permanent laryngectomy. [tracheo- + G. stoma, mouth]
Tracheostomy
: A surgical operation to create an opening (stoma) into the windpipe (the trachea). The opening itself can also be called a tracheostomy. A tracheostomy may be needed on an ...
tracheotome
A knife used in the operation of tracheotomy.
tracheotomy
The operation of incising the trachea, usually intended to be temporary. SEE ALSO: tracheostomy. [tracheo- + G. tome, incision]
Trachipleistophora
A genus of microsporidia that can infect humans and cause myositis, keratoconjunctivitis, and sinusitis in the immunocompromised person.
trachitis
SYN: tracheitis.
Trachoma
A chronic inflammatory eye disease due to infection with a bacterium called Chlamydia trachomatis. Trachoma results in blindness so frequently that it places a huge burden a ...
trachomatous
Relating to or suffering from trachoma.
trachychromatic
Denoting a nucleus with very deeply staining chromatin. [G. trachys, rough, + chromatikos, chromatic]
trachyonychia
Rough-surfaced nails. [G. trachys, rough, + onyx, onychos, nail, + suffix -ia, condition]
trachyphonia
Roughness of voice. [G. trachys, rough, + phone, voice]
tracing
1. Any graphic display of electrical or mechanical cardiovascular events, e.g., electrocardiogram, phlebogram. SEE ALSO: curve. 2. In dentistry, a line or lines, scribed on a ...
tract
An elongated area, e.g., path, track, way. SEE ALSO: fascicle. SYN: tractus. [L. tractus, a drawing out] - alimentary t. SYN: digestive t.. - anterior corticospinal t. ...
tractellum
An anterior locomotor flagellum of a protozoon. [Mod. L. dim. of L. tractus]
Traction
In medicine, a procedure for manually pulling a part of the body to a beneficial effect. See traction, orthopedic. * * * 1. The act of drawing or pulling, as by an elastic or ...
Traction, orthopedic
The use of a system of weights and pulleys to gradually change the position of a bone. It may be used in cases of bone injury or congenital defect, to prevent scar tissue from ...
tractor
An instrument for exerting traction upon an organ or structure. [Mod. L. a drawer, see traction] - Lowsley t. a slender curved instrument with flexible blades at its tip, which ...
tractotomy
Interruption of a nerve tract in the brainstem or spinal cord. [L. tractus, tract, + G. tome, incision] - anterolateral t. SYN: anterolateral cordotomy. - intramedullary t. ...
tractus
SYN: tract. [L. a drawing, drawing out, extent, tract, fr. traho, pp. t., to draw] - t. anterolaterales SYN: anterolateral system. - t. bulboreticulospinalis [TA] SYN: ...
Traditional oriental medicine
1. This is a sophisticated form of medicine comprised of many systematic techniques and methods, including acupuncture, herbal medicine, acupressure, qi gong, and oriental ...
trafficking
SYN: processing (1). See targeting.
tragacanth, tragacantha
A gummy exudation from Astragalus species, including A. gummifer, shrubs of the eastern end of the Mediterranean; it occurs as bands or strings of a tough gummy substance, ...
tragal
Relating to the tragus.
tragi
1. Plural of tragus. 2. [NA] The hairs growing at the entrance to the external acoustic meatus.
tragicus
See t. (muscle).
tragion
A cephalometric point in the notch just above the tragus of the ear; it lies 1–2 mm below the spine of the helix, which can be palpated.
tragomaschalia
Bromidrosis of the axillae. [G. tragomaschalos, with smelling armpits, fr. tragos, goat, + maschale, the axilla]
tragophonia, tragophony
SYN: egophony. [G. tragos, goat, + phone, voice]
tragus
1. [NA] A tonguelike projection of the cartilage of the auricle in front of the opening of the external acoustic meatus and continuous with the cartilage of this canal. SYN: ...
TRAIL
A member of the tumor necrosis factor ligand family that rapidly induces apoptosis in a variety of transformed cell lines. SYN: apo-2L.
training
An organized system of education, instruction, or discipline. - assertive t. a form of behavior modification or therapy in which a client is taught to feel free to make legitimate ...
Training, cross
Doing two or more aerobic activities such as jogging, bicycling, and swimming on a regular basis.
Trait
In genetics, a trait refers to any genetically determined characteristic. In technical terms, a genetic trait is amenable to segregation analysis rather than quantitative ...
Trait, dominant lethal
A genetic trait that, if present in the genome of the individual, is expressed and therefore precludes the individual's having descendants. All such cases with a dominant lethal ...
Trait, sickle cell
A person who possess one copy of the gene for sickle cell anemia. This person carries the gene but does not have the disease. If two people with sickle cell trait have children ...
trajector
An infrequently used instrument for locating the course of a bullet in a wound. [L. fr. tra-jicio, pp. -jectus, to throw over or across]
tramadol
An analgesic drug whose mechanism of action is unusual in that one optical isomer exerts typical opioid-type effects and the other isomer interacts with the reuptake and/or ...
tramazoline hydrochloride
An adrenergic and sympathomimetic agent used for nasal decongestion.
trance
An altered state of consciousness as in hypnosis, catalepsy, or ecstasy. [L. transeo, to go across] - death t. a condition of suspended animation, marked by unconsciousness ...
tranexamic acid
A competitive inhibitor of plasminogen activation and of plasmin; used in hemophilia to reduce or prevent hemorrhage.
Tranquilizer
In pharmacology, a drug that calms and relieves anxiety. The first tranquilizer, chlordiazepoxide hydrochloride (brand name: Librium) received FDA approval in 1960. ...
Trans fat
An unhealthy substance, also known as trans fatty acid, made through the chemical process of hydrogenation of oils. Hydrogenation solidifies liquid oils and increases the ...
Trans fatty acid
An unhealthy substance, also known as trans fat, made through the chemical process of hydrogenation of oils. Hydrogenation solidifies liquid oils and increases the shelf life ...
trans-
1. Prefix (in italics) denoting across, through, beyond; opposite of cis-. 2. In genetics, a prefix denoting the location of two genes on opposite chromosomes of a homologous ...
Trans- (prefix)
From the Latin meaning “across, over, or beyond.” Medical terms containing “trans- “ as a prefix include transcription, transfusion, transplant, transsexual, ...
trans-retinal
SYN: all-t.retinal.
trans-splicing
Formation of spliced products containing portions of two different transcripts.
transacetylase
SYN: acetyltransferase.
transacetylation
Transfer of an acetyl group (CH3CO–) from one compound to another; such reactions, usually involving formation of acetyl-CoA, occur notably in the initiation of the ...
transaction
1. Interaction arising from the encounter of two or more persons. 2. In transactional analysis, the unit of analysis involving a social stimulus and a response.
transacylases
SYN: acyltransferases.
transacylation
The reversible transfer of acyl groups.
transaldolase
Transferase interconverting sedoheptulose 7-phosphate and d-glyceraldehyde 3-phosphate to d-erythrose 4-phosphate and d-fructose 6-phosphate; part of the pentose phosphate ...
transaldolation
A reaction involving the transfer of an aldol group (CH2OH–CO–CHOH–) from one compound to another; such reactions generally involve the sugar phosphates and occur in the ...
transamidation
The transfer of NH2 from an amide moiety ( E.G., from glutamine) to another molecule.
transamidinases
SYN: amidinotransferases.
transamidination
A reaction involving the transfer of an amidine group (NH2C=NH) from one compound to another; the amidine donor is generally l-arginine and the reaction is of significance in ...
Transaminase biochemistry
The transaminases are enzymes that catalyze chemical reactions in the body in which an amino group is transferred from a donor molecule to a recipient molecule. Hence, the name ...
Transaminase clinical usage
Two of the better known enzymes in the transaminase class are serum glutamic oxaloacetic transaminase (SGOT) and serum glutamic pyruvic transaminase (SGPT). Both SGOT and SGPT ...
Transaminase nomenclature
The names and abbreviations applied to the transaminases are quite confusing since (just as a starter) a transaminase is an aminotransferase, SGOT is known alternatively as ...
Transaminase, serum glutamic oxaloacetic
An enzyme that is normally present in liver and heart cells, and is released into blood when the liver or heart is damaged. Blood SGOT levels are thus elevated with liver damage ...

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