| trochus | <zoology> Any one of numerous species of marine univalve shells belonging to Trochus and many allied genera of the family Trochidae. Some of the species are called also topshells. Origin: NL, fr. Gr. A wheel. Source: Websters Dictionary (01 Mar 1998) |
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| Troeger's base | <chemical> Pharmacological action: enzyme inhibitor Synonym: 2,8-dimethyl-6h,12h-5,11-methanodibenzo(b,f)(1,5)-diazocine (26 Jun 1999) |
| troglodyte | 1. <ethnology> One of any savage race that dwells in caves, instead of constructing dwellings; a cave dweller. most of the primitive races of man were troglodytes. "In the troglodytes' country there is a lake, for the hurtful water it beareth called the "mad lake."" (Holland) 2. <zoology> A genus of apes including the chimpanzee. 3. <ornithology> A genus of singing birds including the common wrens. Origin: L. Troglodytae, pl, Gr. One who creeps into holes; a hole, cavern (fr. To gnaw) + enter: cf. F. Troglodyte. Source: Websters Dictionary (01 Mar 1998) |
| Troglotrema salmincola | A digenetic fish-borne fluke (family Nanophyetidae) of dogs and other fish-eating mammals; the vector of Neorickettsia helmintheca, the agent of salmon poisoning. Synonym: Troglotrema salmincola. (05 Mar 2000) |
| troglotrematidae | A family of flukes (trematoda) usually under 10 mm in length, some being only 1 or 2 mm long. In general they are thick, spinous, or scaly flukes having an oval outline and living in various organs and sinuses of birds and mammals. The genus with the greatest interest is paragonimus. (12 Dec 1998) |
| trogon | <ornithology> Any one of numerous species of beautiful tropical birds belonging to the family Trogonidae. They are noted for the brilliant colours and the resplendent luster of their plumage. Some of the species have a train of long brilliant feathers lying over the tail and consisting of the upper tail coverts. Unlike other birds having two toes directed forward and two backward, they have the inner toe turned backward. A few species are found in Africa and India, but the greater number, including the most brilliant species, are found in tropical America. Source: Websters Dictionary (01 Mar 1998) |
| trogonoid | <zoology> Like or pertaining to the trogons. Source: Websters Dictionary (01 Mar 1998) |
| trogue | <chemical> A wooden trough, forming a drain. Origin: Cf. G. Trog trough, E. Trough. Source: Websters Dictionary (01 Mar 1998) |
| troilite | <chemical> Native iron protosulphide, FeS. It is known only in meteoric irons, and is usually in imbedded nodular masses of a bronze colour. Origin: Named after Dominico Troili, an Italian of the 18th century. Source: Websters Dictionary (01 Mar 1998) |
| troilus | <zoology> A large, handsome American butterfly (Euphoeades, or Papilio, troilus). It is black, with yellow marginal spots on the front wings, and blue spots on the rear wings. Origin: NL, fr. L. Troilus, Gr, the son of Priam. Source: Websters Dictionary (01 Mar 1998) |
| Troisier | Charles-Emile, French physician, 1844-1919. See: Troisier's ganglion, Troisier's node. (05 Mar 2000) |
| Troisier's ganglion | Historic term for a lymph node immediately above the clavicle, especially on the left side, that is palpably enlarged as the result of a metastasis from a malignant neoplasm; the presence of such a node indicates that the probable site of primary involvement is in an abdominal organ. See: signal node. Synonym: Troisier's node. (05 Mar 2000) |
| Troisier's node | Historic term for a lymph node immediately above the clavicle, especially on the left side, that is palpably enlarged as the result of a metastasis from a malignant neoplasm; the presence of such a node indicates that the probable site of primary involvement is in an abdominal organ. See: signal node. Synonym: Troisier's node. (05 Mar 2000) |
| trolamine | USAN-approved contraction for triethanolamine, N(CH2CH2OH)3. (05 Mar 2000) |
| troland | A unit of visual stimulation at the retina equal to the illumination per square millimeter of pupil received from a surface of 1 lux brightness. Origin: L.T. Troland, U.S. Physicist, 1889-1932 (05 Mar 2000) |