| triangular part | The middle one of three small convolutions which together compose the inferior frontal gyrus of the cerebral cortex; the other two being the orbital part and opercular part. Synonym: pars triangularis. (05 Mar 2000) |
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| triangular pit of arytenoid cartilage | A deep depression in the upper portion of the anterolateral surface of the arytenoid cartilage, lodging glands. Synonym: fovea triangularis cartilaginis arytenoideae, triangular pit of arytenoid cartilage. (05 Mar 2000) |
| triangular recess | An occasional evagination of the anterior wall of the third ventricle of the brain between the anterior commissure and the diverging pillars of the fornix. Synonym: recessus triangularis. (05 Mar 2000) |
| triangular ridge | A crest or ridge which extends from the apex of a cusp of a premolar or molar tooth toward the central part of the occlusal surface. Synonym: triangular crest, triangular ridge. (05 Mar 2000) |
| triangular uterus | Uterus bicornis in which the fundus between the two cornua is broad and flat. Synonym: triangular uterus, uterus incudiformis, uterus triangularis. (05 Mar 2000) |
| triangulares | <zoology> The triangular, or maioid, crabs. Origin: L. Source: Websters Dictionary (01 Mar 1998) |
| triangularis | See: triangular muscle. Origin: L. Triangular (05 Mar 2000) |
| triangularity | <radiobiology> Geometric factor measuring an aspect of the shape (how triangular it is) of the cross-section of a non-circular plasma in a toroidal device. See: elongation. (09 Oct 1997) |
| triangularity of the teeth | A well-marked indication of advancing age in the horse, shown by increasing depth from front to rear in the occlusal surfaces of the incisor teeth; at nine years, when the marks fail, this sign is of use in determining the age of the animal. (05 Mar 2000) |
| triangulum | See: triangle. Origin: L. (05 Mar 2000) |
| triaosylceramide 1,4-galactosyltransferase | <enzyme> Involved in synthesis of neolacto-glycolipids Registry number: EC 2.4.1.- Synonym: lcose3cer 4-galactosyltransferase, udpgal - lc3beta1-4galt, galt-4 (26 Jun 1999) |
| triarian | Occupying the third post or rank. Origin: L. Triarii, pl, a class of Roman soldiers who formed the third rank from the front, fr. Tres, tria, three. Source: Websters Dictionary (01 Mar 1998) |
| triarticulate | <zoology> Having three joints. Origin: Pref. Tri- + articulate. Source: Websters Dictionary (01 Mar 1998) |
| trias | <geology> The formation situated between the Permian and Lias, and so named by the Germans, because consisting of three series of strata, which are called in German the Bunter sandstein, Muschelkalk, and Keuper. Origin: L, triad. See Triad. Source: Websters Dictionary (01 Mar 1998) |
| triassic | <geology> Of the age of, or pertaining to, the Trias. The Triassic formation. Source: Websters Dictionary (01 Mar 1998) |