| trepan | 1. <surgery> A crown-saw or cylindrical saw for perforating the skull, turned, when used, like a bit or gimlet. See Trephine. 2. <chemical> A kind of broad chisel for sinking shafts. Origin: F. Trepan (cf. Sp. Trepano, It. Trepano, trapano), LL. Trepanum, fr. Gr. A borer, auger, trepan, fr. To bore, a hole. Cf. Trephine. <surgery> To perforate (the skull) with a trepan, so as to remove a portion of the bone, and thus relieve the brain from pressure or irritation; to perform an operation with the trepan. Origin: Cf. F. Trepaner. See Trepan a saw. Source: Websters Dictionary (01 Mar 1998) |
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| trepanation | Synonym: trephination. (05 Mar 2000) |
| trepang | <zoology> Any one of several species of large holothurians, some of which are dried and extensively used as food in China; called also beche de mer, sea cucumber, and sea slug. Alternative forms: tripang. The edible trepangs are mostly large species of Holothuria, especially H. Edulis. They are taken in vast quantities in the East Indies, where they are dried and smoked, and then shipped to China. They are used as an ingredient in certain kinds of soup. Origin: Malay tripang. Source: Websters Dictionary (01 Mar 1998) |
| trephination | Removal of a circular piece ("button") of cranium by a trephine. Synonym: trepanation. (05 Mar 2000) |
| trephine | <surgery> An instrument for trepanning, being an improvement on the trepan. It is a circular or cylindrical saw, with a handle like that of a gimlet, and a little sharp perforator called the center pin. Origin: A dim. Of 1st trepan: cf. F. Trephine. Source: Websters Dictionary (01 Mar 1998) |
| trephine biopsy | <haematology, procedure> Removal of a small core of bone marrow under local anaesthetic. It is used to assess bone marrow structure, the number and distribution of all the blood cell types. (19 Jan 1998) |
| trephining | The removal of a circular disk of the cranium. It is performed with a trephine, a small circular saw with a centre pin mounted on a hollow metal shaft to which is attached a transverse handle. (12 Dec 1998) |
| trephocyte | Synonym: trophocyte. Origin: G. Trepho, to nourish, + kytos, cell (05 Mar 2000) |
| trephones | <cell biology> Substance supposedly released at a wound that stimulate mitosis: the opposite of chalones. (19 Jan 1998) |
| trepidant | Marked by tremor. Origin: L. Trepidans, pres. P. Of trepido, to tremble, to be agitated (05 Mar 2000) |
| trepidatio cordis | <symptom> A subjective sensation of a rapid, irregular or forceful beating of the heart that the patient is aware of. Origin: L. Palpitatio (29 Sep 1997) |
| trepidation | 1. An involuntary trembling, sometimes an effect of paralysis, but usually caused by terror or fear; quaking; quivering. 2. Hence, a state of terror or alarm; fear; confusion; fright; as, the men were in great trepidation. 3. A libration of the starry sphere in the Ptolemaic system; a motion ascribed to the firmament, to account for certain small changes in the position of the ecliptic and of the stars. Synonym: Tremor, agitation, disturbance, fear. Origin: F. Trepidation, L. Trepidatio, fr. Trepidare to hurry with alarm, to tremble, from trepidus agitated, disturbed, alarmed; cf. Trepit he turns, Gr. To turn, E. Torture. Source: Websters Dictionary (01 Mar 1998) |
| treponaemiasis | Infection caused by Treponema. Synonym: treponematosis. (05 Mar 2000) |
| treponaemicidal | Destructive to any species of Treponema, but usually with reference to T. Pallidum. Synonym: antitreponemal. Origin: Treponema + L. Caedo, to kill (05 Mar 2000) |
| Treponema | <bacteria> Genus of bacteria of the spirochaete family (Spirochaetaceae). Treponema pallidum causes syphilis. Cells are corkscrew like, (6-15um long,0.1-0.2um wide), motile, anaerobic and with a peptidoglycan cell wall and a capsule of glycosaminoglycans similar to hyaluronic acid and chondroitin sulphate in composition. Membrane has cardiolipin. (19 Jan 1998) |