A class of antitumor agents derived directly or semisynthetically from Taxus brevifolius, the Pacific yew; examples include paclitaxel and docetaxel.
1. Reduction of a hernia or of a dislocation of any part by means of manipulation. 2. Systematic classification or orderly arrangement. 3. The reaction of protoplasm to a ...
The name given to a particular level or grouping in a systematic classification of living things or organisms (taxonomy). [G. taxis, order, arrangement, + -on]
The systematic classification of living things or organisms. Kingdoms of living organisms are divided into groups ( taxa) to show degrees of similarity or presumed evolutionary ...
Genus of plants including the Pacific yew (Taxus brevifolius); its bark yields antitumor agents of the taxane group.
Warren, English physician, 1843–1927. See T. cherry-red spot, T.- Sachs disease.
Tay-Sachs disease (TSD)
This disease is concisely defined by OMIM (Online Mendelian Inheritance in Man) as “an autosomal recessive, progressive neurodegenerative disorder, which in the classic ...
Hooshang, U.S. pediatrician and radiologist, *1919. See Rubinstein-T. syndrome.
Charles F., U.S. orthopedic surgeon, 1827–1899. See T. back brace, T. apparatus, T. splint.
Robert W., U.S. dermatologist, 1842–1908. See T. disease.
Common abbreviation (spelled out T-B) for tuberculosis. Tuberculosis took its name from the characteristic tubercles (tiny lumps) caused by infection with the bacteria ...
Abbreviation for thyroxine-binding globulin.
Abbreviation for tert-butyloxycarbonyl.
Abbreviation for thyroxine-binding protein.
Abbreviation for thyroxine-binding prealbumin.
Abbreviation for total blood volume.
Abbreviation for total body water.
Symbol for technetium.
Abbreviation for T cytotoxic cells, under cell.
TC-99 tetrofosmin scintimammography
Scintimammography is an imaging technique that uses a radioisotope (a radioactive substance) to help visualize the breast and find cancer. Scintimammography using the ...
Abbreviation for time compensation gain.
Adult diphtheria and tetanus toxoids. See Td immunization.
Abbreviation for testis-determining factor.
Abbreviation for ribothymidine 5′-diphosphate. The thymidine analog is dTDP.
Abbreviation for terminal deoxynucleotidyl transferase.
In magnetic resonance spin echo pulse sequences, the time to echo, when the magnetization signal is sampled.
1. The dried leaves of various genera of the family Theaceae, including Thea (T. senensis), Camellia, and Gordonia, a shrub indigenous to China, southern and southeastern Asia, ...
Thomas P., English surgeon, 1801–1868.
A discontinuity in substance of a structure. Cf.:laceration.
- bucket-handle t. a t. and separation in the central part of a semilunar cartilage with the ends intact that ...
The fluid secreted by the lacrimal glands by means of which the conjunctiva and cornea are kept moist. [A.S. teár]
- artificial tears mixtures of fluid compounds to substitute ...
To separate the structural parts of a tissue by means of a needle, in order to prepare it for microscopic examination. [A. S. taesan]
An old-fashioned but convenient household measure. A teaspoon holds about 5 cc of liquid.
* * *
A small spoon, holding about 1 dram (or about 5 mL) of liquid; used as a measure ...
1. SYN: nipple. 2. SYN: breast. 3. SYN: papilla. [A.S. tit]
USAN-approved contraction for tertiary butylacetate, (CH3)3C–CH2–CO2−.
An artificial radioactive element, atomic no. 43, atomic wt. 99, produced in 1937 by bombardment of molybdenum by deuterons; also a product of the fission of 235U; used ...
Technetium tetrofosmin scintimammography
Scintimammography is an imaging technique that uses a radioisotope (a radioactive substance) to help visualize the breast and find cancer. Scintimammography using the ...
A radioisotope of technetium which is the decay product of technetium-99m and has a weak beta emission and a physical half-life of 213,000 years.
A radioisotope of technetium that decays by isomeric transition, emitting an essentially monoenergetic gamma ray of 142 keV with a half-life of 6.01 hr. It is usually ...
1. Relating to technique. 2. Pertaining to some particular art, science, or trade. 3. In connection with a chemical substance, denoting that the substance contains appreciable ...
The manner of performance, or the details, of any surgical operation, experiment, or mechanical act. SEE ALSO: method, operation, procedure. SYN: technic. [Fr., fr. G. technikos, ...
SYN: actual cautery. [G. techne, art, + kausis, a burning]
One trained in and using the techniques of a profession, art, or science. SYN: technician.
The knowledge and use of the techniques of a profession, art, or science. [G. techne, an art, + logos, study]
- assisted reproductive t. originally, a range of techniques for ...
The process of converting scientific findings from research laboratories into useful products by the commercial sector.
Technology, recombinant DNA
A series of procedures used to join together (recombine) DNA segments. A recombinant DNA molecule is constructed (recombined) from segments from 2 or more different DNA ...
A name for a family of icosahedral nonenveloped double-stranded DNA bacteriophages that have double capsids. [L. tectum, roof, covering, + virus]
SYN: scaphocephalic. [L. tectum, roof, + G. kephale, head]
Structural morphology. [G. tekton, builder, + -logia]
Relating to variations in structure in the eye, particularly the cornea. [G. tektonikos, relating to building]
Relating to or characteristic of a tectorium.
1. An overlaying structure. 2. SYN: tectorial membrane of cochlear duct. [L. an overlaying surface ( plaster, stucco), fr. tego, pp. tectus, to cover]
Denoting nerve fibers passing from the mesencephalic tectum to the spinal cord.
Any rooflike covering or structure. [L. roof, roofed structure, fr. tego, pp. tectus, to cover]
- t. mesencephali [TA] SYN: lamina of mesencephalic t..
- t. of midbrain SYN: ...
Abbreviation for total end- diastolic diameter.
Transesophageal echocardiography. A diagnostic test which employs ultrasound waves to make images of the heart chambers, valves and surrounding structures and which is done ...
Plural of tooth.
- acoustic t. [TA] tooth-shaped formations or ridges occurring on the vestibular lip of the limbus lamina spiralis of the cochlear duct. SYN: dentes acustici ...
Eruption or “cutting” of the teeth, especially of the deciduous teeth. SYN: odontiasis.
A nonexplosive and nonflammable inhalation anesthetic of moderate potency.
A structure that covers or roofs over a part. [L. a covering, fr. tego, to cover]
- t. cruris old term for tegmentum mesencephali.
- t. mastoideum the lamina of bone roofing over ...
Relating to, characteristic of, or placed or oriented toward a tegmentum or tegmen.
Production of lesions in the reticular formation of the midbrain tegmentum. [ tegmentum + G. tome, incision]
1. A covering structure. 2. SYN: mesencephalic t.. [L. covering structure, fr. tego, to cover]
- t. mesencephali [TA] SYN: mesencephalic t..
- mesencephalic t. that major ...
1. SYN: integument. 2. SYN: integument (2). [L. tegumentum, a collat. form of tegmentum]
Ludwig, German histologist, 1823–1895. See T. crystals, under crystal.
One of two classes (the other being the muramic acid s or mucopeptides) of polymers constituting the cell walls of Gram-positive bacteria, but also found intracellularly; linear ...
The jagged, shimmering visual sensation resembling the fortifications of a walled medieval town; the scintillating scotoma of migraine. [G. teichos, wall, + opsis, vision]
1. Any thin weblike structure. 2. A tissue; especially one of delicate formation. [L. a web]
- t. choroidea [TA] that portion of the pia mater that covers the ependymal roof ...
One of the medium stomach worm species (family Trichostrongylidae) of sheep, goats, and deer occurring in the abomasum; it is similar to Ostertagia trifurcata. [ tele- + L. ...
SYN: referred pain. [G. tele, distant, + algos, pain]
Dilation of the previously existing small or terminal vessels of a part. SYN: angiotelectasis, angiotelectasia. [G. telos, end, + angeion, vessel, + ektasis, a stretching out]
Telangiectasia, hereditary hemorrhagic
A genetic disease characterized by the presence of multiple direct connections between arteries and veins called arteriovenous malformations (AVMs). The small AVMs close to the ...
A lesion formed by a dilated capillary or terminal artery, most commonly on the skin. See telangiectasia.
A term used to qualify highly vascular tumors. [ telangiectasis + G. -odes, fr. eidos, resemblance]
Angioma due to dilation of the capillaries or terminal arterioles.
One of the terminal arterioles or a capillary vessel. SYN: trichangion. [G. telos, end, + angeion, vessel]
Any disease of the capillaries and terminal arterioles.
Referring to the nitrogen atom of the imidazole ring of histidine that is the farthest from the β-carbon. Cf.:pros. [G. far]
Increased distance between the medial canthi of the eyelids. SYN: canthal hypertelorism. [G. tele, distant, + kanthos, canthus]
A specially constructed stethoscope by means of which heart sounds can be heard by listeners at a distance from the patient. [G. tele, distant, + kardia, heart, + phone, sound]
Teletherapy using radioactive cobalt as the source.
Detection of a disease by evaluation of data transmitted to a receiving station, a process normally involving patient-monitoring instruments and a transfer link to a diagnostic ...
Pertaining to or occurring toward the end of ventricular diastole. [G. telos, end, + diastole, dilation]
An electrocardiogram recorded at a distance from the subject being tested; e.g., the electrocardiogram obtained through telemetry, or, as with a galvanometer in the ...
An electronic instrument that senses and measures a quantity, then transmits radio signals to a distant station for recording and interpretation. [G. tele, distant, + metron, ...
The science of measuring a quantity, transmitting the results by radio signals to a distant station, and there interpreting, indicating, and/or recording the results. SEE ALSO: ...
The anterior division of the prosencephalon, which develops into the olfactory lobes, the cortex of the cerebral hemispheres, and the subcortical telencephalic nuclei, and the ...
Serving an ultimate purpose in its design. For example, "What is the true purpose of the nose?" That is a teleological question. For another example, to say that all evolutionary ...
The study of the ultimate purpose of the design of something in nature. For examples, "what is the true purpose of the nose?" is a teleological question and, to say that all ...
A completed mitosis. [G. teleos, complete, + mitosis]
A reproductive structure of a fungus that is a result of plasmogamy and nuclear recombination; sexual state (sexual reproduction). SYN: perfect stage.
1. Pertaining to teleonomy. 2. In psychology, pertaining to those patterns of behavior that are a function of an inferred purpose or motive; e.g., a child's behavior pattern ...
The doctrine that life is characterized by endowment with a project or purpose; i.e., the existence in an organism of a structure or function implies that it has had evolutionary ...
An error in judging the distance of objects arising from lesions in the parietal temporal region. [G. tele, distant, + opsis, vision]
Manifesting life. [G. teleos, complete, + organikos, organic]
Transmittal and reception of thoughts by means other than through the normal senses, as a form of extrasensory perception. SYN: extrasensory thought transference, mind-reading. ...
Radiography with the x-ray tube positioned about 2 m from the film thereby securing practical parallelism of the x-rays to minimize geometric distortion; the standard ...
The interpretation of digitized diagnostic images transmitted by modem over telephone lines. [ tele- + radiology]
An organ, such as the eye, that can receive sense stimuli from a distance.
SYN: automatism. [G. tele, far off, + ergon, work]
Hopkins rod-lens t. an endoscopic t. in which the air-containing spaces between the conventional series of lenses are replaced with glass rods with polished ends separated by ...
A goal to be attained by planned conduct. [G. telos, end, + -osis, condition]
Surgical procedures carried out at a distance thanks to advances in robotic and computer technology and their applications to surgery. The first demonstration of trans-Atlantic ...
Relating to the end of ventricular systole. [G. telos, end, + systole, a contracting]
Radiation therapy administered with the source at a distance from the body. Cf.:interstitial therapy. SYN: teleroentgentherapy. [G. tele, distant, + therapeia, treatment]
Richard W., U.S. gynecologist, *1894. See T. operation.
1. Relating to or originating in the earth. 2. Relating to the element tellurium, especially in its 6+ valence state. [L. tellus (tellur-), the earth]
The alleged influence of soil emanations in producing disease. [L. tellus (tellur-), the earth]
A rare semimetallic element, atomic no. 52, atomic wt. 127.60, belonging to the sulfur group. [L. tellus (tellur-), the earth]
An anomalous term that refers to the terminal arborization of an axon. SYN: end- brush. [G. telos, end, + dendron, tree]
Resting phase of hair cycle. [G. telos, end, + -gen, producing]
Accumulation of neurolemmal cells at the myoneural junction. [G. telos, end, + glia, glue]
Obsolete term denoting diagnosis by means of radiographs or other diagnostic tests transmitted by telephone or radio. See teleradiology. [G. tele, distant, + gnosis, a knowing]
SYN: telophase. [G. telos, end, + kinesis, movement]
Denoting an ovum in which a large amount of deuteroplasm or yolk accumulates at the vegetative pole, as in the eggs of birds and reptiles. [G. telos, end, + G. lekithos, yolk] ...
An enzyme (a biologic catalyst) that has to do with the telomere, the end of the chromosome which is composed of short repeated DNA sequences. Telomerase may play a role in the ...
The end of a chromosome, a specialized structure involved in the replication and stability of the chromosome. On the DNA level, the telomere is a dull stretch of road. It is a ...
A peptide covalently bound in or on a protein, protruding therefrom and therefore subject to enzyme attack and maturation modification or cross-linking, and conferring ...
The final stage of mitosis or meiosis that begins when migration of chromosomes to the poles of the cell has been completed; the chromosomes progressively lengthen while the ...
A former order of Sporozoea. [G. telos, end, + sporos, seed]
The perfect performance of a function, as that of sight or hearing. [G. telos, end]
Abbreviation for triethylenemelamine.
A benzodiazepine sedative-hypnotic primarily used to relieve insomnia.
1. Disposition; in general, any characteristic or particular state of mind. SYN: temperament (2). 2. A display of irritation or anger. See tantrum. 3. To treat metal by ...
1. The psychological and biological organization peculiar to the individual, including one's character or personality predispositions, that influence the manner of thought and ...
Moderation in all things; especially, abstinence from the use of alcoholic beverages. [L. temperantia, moderation]
Moderate; restrained in the indulgence of any appetite or activity.
The temperature is the specific degree of hotness or coldness of the body. It is usually measured with a thermometer.
* * *
The sensible intensity of heat of any substance; the ...
1. A pattern or guide that determines the shape of a substance. 2. Metaphorically, the specifying nature of a macromolecule, usually a nucleic acid or polynucleotide, with ...
An area just behind and to the side of the forehead and the eye, above the side of the check bone (the zygomatic arch) and in front of the ear. In optometry, the temple is the ...
Undergoing spontaneous change or destruction during the passage of time. [L. tempus, time, + labilis, perishable]
The temples. [L. pl. of tempus]
1. Relating to time; limited in time; temporary. 2. Relating to the temple. See t. region of head. [L. temporalis, fr. tempus (tempor-), time, temple]
Also called giant cell arteritis or cranial arteritis, this is a serious disease characterized by inflammation of the walls of the blood vessels (vasculitis). The vessels ...
A large irregular bone situated at the base and side of the skull. The temporal bone consists of three parts (squamous, tympanic and petrous) which are distinct at birth but ...
Epilepsy (seizures) characterized by abnormal electrical activity in the temporal lobe of the brain. This electrical activity does not cause grand or petit mal seizures, but ...
Temporary loss of consciousness
A partial or complete loss of consciousness with interruption of awareness of oneself and ones surroundings. When the loss of consciousness is temporary and there is spontaneous ...
Temporal (2). [L. temporalis, temporal]
Relating to the temporal and the hyoid bones or regions.
Relating to the temporal bone and the mandible; denoting the joint of the lower jaw. SYN: temporomaxillary (2).
Temporomandibular joint (TMJ)
The joint that hinges the lower jaw (mandible) to the temporal bone of the skull. It is one of the most frequently used joints in the entire body, moving whenever a person eats, ...
Temporomandibular joint (TMJ) syndrome
A disorder of the temporomandibular joint(s) that causes pain, usually in front of the ear(s), sometimes in the form of a headache. Pain in the TMJ can be due to trauma, such as ...
1. Relating to the regions of the temporal and maxillary bones. 2. SYN: temporomandibular.
Relating to the temporal and the parietal bones or regions.
Referring to the projection fibers from the temporal lobe of the cerebral cortex to the basilar part of the pons.
Relating to the temporal and zygomatic bones or regions. SYN: temporomalar.
SYN: utilization time. [Fr. service or utilization time]
1. The temple. 2. SYN: time. [L. time]
Abbreviation for toxic epidermal necrolysis.
C., Dutch surgeon. See ten Horn sign.
An acute highly contagious viral disease with fever, runny nose, cough, red eyes, and a spreading skin rash, the measles (also known as rubeola) is a potentially disastrous ...
Sticky; denoting tenacity. [L. tenax (tenac-), fr. teneo, to hold]
Adhesiveness; the character or property of holding fast. [L. tenacitas, fr. teneo, to hold]
- cellular t. the inherent property of all cells to persist in a given form or ...
A surgical clamp designed to hold or grasp tissue during dissection, commonly used to grasp the cervix. [L. a holder, fr. teneo, to hold]
- tenacula tendinum a tendinous ...
Obsolete term for pain referred to a tendon. SYN: tenodynia. [G. tenon, tendon, + algos, pain]
- t. crepitans SYN: tenosynovitis crepitans.
A protein that is present in the mesenchyme that surrounds epithelia in organs undergoing development in embryos; believed to participate in inducing differentiation of ...
Sensitive or painful as a result of pressure or contact that is not sufficent to cause discomfort in normal tissues. [L. tener, soft, delicate]
The condition of being tender.
- pencil t. strictly localized t., elicited by pressure with the rubber tip of a pencil, e.g., in cases of incomplete or subperiosteal fracture.
Reparative or plastic surgery of the tendons. SYN: tenontoplasty, tenoplasty. [Mediev. L. tendo (tendin-), tendon, + G. plastos, formed]
Relating to, composed of, or resembling a tendon.
SYN: tendon.For histologic description, see tendon. [Mediev. L., fr. L. t., to stretch out, extend]
- t. Achillis SYN: calcaneal tendon, calcaneal tendon.
- t. calcaneus [TA] ...
The Achilles tendon, a tough sinew that attaches the calf muscle to the back of the heel bone. The Achilles tendon is one of the longest tendons in the body. It is also ...
A tough sinew that attaches the calf muscle to the back of the heel bone (the calcaneus). Also called the Achilles tendon, it is one of the longest tendons in the body. ...
A tendon. SEE ALSO: teno-. [L. tendo]
SYN: tenolysis. [ tendo- + G. lysis, dissolution]
The tissue by which a muscle attaches to bone. A tendon is somewhat flexible, but fibrous and tough. When a tendon becomes inflamed, the condition is referred to as tendinitis or ...
A tough sinew that attaches the calf muscle to the back of the heel bone. The Achilles tendon is one of the longest tendons in the body. It is also formally called the tendo ...
Inflammation of a tendon. SYN: tendinitis, tenonitis (2), tenontitis.
Relating to a tendon and its sheath. [ tendo- + L. vagina, sheath]
SYN: tenosynovitis. [ tendo- + L. vagina, sheath, + G. -itis, inflammation]
- radial styloid t. SYN: de Quervain disease.
Resection of part of a tendon. SYN: tenonectomy. [G. tenon, tendon, + ektome, excision]
Relating to or marked by tenesmus.
Straining, especially long-continued, ineffectual and painful straining, at stool or in urination. Straining at stool is called rectal tenesmus; straining at urination is ...
1. Any anatomic bandlike structure. 2. SYN: taenia (2). [L. fr. G. tainia, band, tape, a tapeworm]
- taeniae acusticae SYN: medullary striae of fourth ventricle, under stria.
An agent destructive to tapeworms. SYN: tenicide. [L. taenia, tapeworm, + caedo, to kill]
An agent that causes the expulsion of tapeworms. SYN: tenifuge. [L. taenia, tapeworm, + fugo, to put to flight]
1. Relating to a tapeworm. 2. Relating to one of the structures called tenia.
Presence of a tapeworm in the intestine.
- somatic t. invasion of the body by the cysticercus of a tenioid worm.
Having the power to expel tapeworms.
1. Band-shaped; ribbon-shaped. 2. Resembling a tapeworm. SYN: teniform. [G. tainia, a tape, + eidos, resemblance]
A slender tenia or bandlike structure. [L. dim. of taenia, ribbon]
- taeniola corporis callosi SYN: rostral lamina.
Stabilizing a joint by anchoring the tendons which move that joint and thereby preventing any further excursion of the tendons. [teno- + G. desis, a binding]
SYN: tenalgia. [teno- + G. odyne, pain]
SYN: tonofibril. [teno- + Mod. L. fibrilla, a small fiber]
Release of a tendon from adhesions. SYN: tendolysis.
Jacques R., French pathologist and oculist, 1724–1816. See T. capsule, T. space.
SYN: tenectomy. [ tenon- + G. ektome, excision]
1. Inflammation of Tenon capsule or the connective tissue within Tenon space. 2. SYN: tendonitis. [tenont- + G. -itis, inflammation]
SYN: tendonitis. [tenont- + G. -itis, inflammation]
A treatise on or description of the tendons. [ tenonto- + G. graphe, description]
The branch of science that has to do with the tendons. [ tenonto- + G. logos, study]
Obsolete term for a combined tenontoplasty and myoplasty, used in the radical correction of a hernia. SYN: tenomyoplasty. [ tenonto- + G. mys, muscle, + plastos, formed]
SYN: tendinoplasty. [ tenonto- + G. plastos, formed]
A heart murmur assumed to be due to an abnormal condition of the chordae tendineae. SYN: tendophony. [teno- + G. phone, sound]
Bony or cartilaginous growth in or on a tendon. [teno- + G. phyton, plant]
A receptor in a tendon, activated by increased tension.
Suture of the divided ends of a tendon. SYN: tendinosuture, tendon suture, tenosuture. [teno- + G. rhaphe, suture]
Ossification of a tendon. [teno- + G. osteon, bone, + -osis, condition]
Using a tendon as a suspensory ligament, sometimes as a free graft or in continuity.
Excision of a tendon sheath. [teno- + synovia + G. ektome, excision]
Inflammation of a tendon and its enveloping sheath. SYN: tendinous synovitis, tendosynovitis, tendovaginitis, tenovaginitis. [teno- + synovia + G. -itis, inflammation]
- t. ...
1. Canopy used in various types of inhalation therapy to control humidity and concentration of oxygen in inspired air. 2. Cylinder of some material, usually absorbent, ...
A tent-like device used to deliver high levels of oxygen to a patient in a bed. The tent typically covers the whole bed of an infant and the head and upper body of an older child ...
A slender process for feeling, prehension, or locomotion in invertebrates. [Mod. L. tentaculum, a feeler, fr. tento, to feel]
Tenth cranial nerve
The tenth cranial nerve, and one of the most important, is the vagus nerve. All twelve of the cranial nerves, the vagus nerve included, emerge from or enter the skull (the ...
A membranous cover or horizontal partition. [L. tent, fr. tendo, to stretch]
- t. cerebelli [TA] a strong fold of dura mater roofing over the posterior cranial fossa with an ...
Abbreviation for triethylenephosphoramide.
Softening of the gray matter of the brain or spinal cord. [G. tephros, ashen-gray, + malakia, softness]
An instrument for measuring the thickness of the cerebral cortex; it consists of a graduated tube of thin glass which is inserted into the brain substance, so the depth of the ...
Abbreviation for tetraethyl pyrophosphate.
A nonapeptide in which glycine is replaced by tryptophan, leucine and the first proline are missing, and lysine is replaced by glutamine; an angiotensin-converting enzyme ...
ter in die (on prescription)
Seen on a prescription, tid means three times a day. It is an abbreviation for "ter in die" which in Latin means three times a day. The abbreviation "tid" is sometimes written ...
1. Prefix used in the SI and metric system to signify one trillion. 2. Combining form denoting a teras. SEE ALSO: terato-. [G. teras, monster]
Conceptus with deficient, redundant, misplaced, or grossly misshapen parts. [G.]
SYN: teratosis. [G. teratisma, fr. teras]