| triple symptom complex | <syndrome> A multisystem, chronic recurrent disease characterised by ulceration in the mouth and genitalia, iritis, uveitis, arthritis and thrombophlebitis. Often treated with immunosuppressive therapy (corticosteroids, chlorambucil). (27 Sep 1997) |
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| triple vision | Visual defect in which three images of the same object are seen. Synonym: triple vision. Origin: G. Triploos, triple, + opsis, sight (05 Mar 2000) |
| triple X syndrome | <syndrome> In principle, the phenotypic features characteristic of trisomy of the X chromosome. Original observations (made in mental institutions) were seriously biased and the phenotypic changes spurious; now, even the remaining claim, that there is mild mental retardation, is suspect. The outstanding feature of the syndrome is the occurence of twin Barr bodies in a typical cell. (05 Mar 2000) |
| triple-tail | <zoology> An edible fish (Lobotes Surinamensis) found in the warmer parts of all the oceans, and common on the southern and middle coasts of the United States. When living it is silvery gray, and becomes brown or blackish when dead. Its dorsal and anal fins are long, and extend back on each side of the tail. It has large silvery scales which are used in the manufacture of fancy work. Synonym:, locally, black perch, grouper, and flasher. Source: Websters Dictionary (01 Mar 1998) |
| triplegia | Paralysis of an upper and a lower extremity and of the face, or of both extremities on one side and of one on the other. Origin: tri-+ G. Plege, stroke (05 Mar 2000) |
| triplet | <microscopy> A combination of three simple lenses cemented together. Two positive lenses with a negative lens between them can produce a well-corrected system. (05 Aug 1998) |
| triplet state | A second excited state of a molecule (e.g., chlorophyll) produced by absorption of light to produce the singlet state, then loss of some energy (fluorescence) to arrive at the longer-lived triplet state The molecule may remain sufficiently long in the triplet state for a second activating light quantum to be effective in producing a "second triplet" state, obviously at still a higher level of excitation, hence reactivity. Alternatively, it may lose the triplet state energy directly and return to the ground state. (05 Mar 2000) |
| triplicate | Folded three times. (09 Oct 1997) |
| triplicate-ternate | <botany> Triternate. Source: Websters Dictionary (01 Mar 1998) |
| triplicostate | <botany> Three-ribbed. Origin: Triple + costate. Source: Websters Dictionary (01 Mar 1998) |
| triplite | <chemical> A mineral of a dark brown colour, generally with a fibrous, massive structure. It is a fluophosphate of iron and manganese. Origin: Cf. F. Triplite. See Triple. Source: Websters Dictionary (01 Mar 1998) |
| triploblastic | <embryology> Describes an animal which, as an embryo, had three distinct embryonic tissue layers - the ectoderm, mesoderm, and endoderm. This is in contrast to animals which are diploblastic (has two distinct tissue layers) and those which do not have any distinct tissue layers as an embryo (nor organs and distinct tissues as an adult). (09 Oct 1997) |
| triploid | <genetics, molecular biology> Having three times the haploid number of chromosomes. (18 Nov 1997) |
| triploidite | <chemical> A manganese phosphate near triplite, but containing hydroxyl instead of fluorine. Source: Websters Dictionary (01 Mar 1998) |
| triploidy | The presence of three haploid sets of chromosomes, instead of two, in all cells; results in foetal or neonatal death. (05 Mar 2000) |