| toxoplasmosis, ocular | Infection caused by the protozoan parasite toxoplasma in which there is extensive connective tissue proliferation, the retina surrounding the lesions remains normal, and the ocular media remain clear. Chorioretinitis may be associated with all forms of toxoplasmosis, but is usually a late sequel of congenital toxoplasmosis. The severe ocular lesions in infants may lead to blindness. (12 Dec 1998) |
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| toxopyrimidine | 4-amino-5-hydroxymethyl-2-methylpyrimidine;one of the products resulting from the hydrolysis of thiamin by thiaminase and appearing in the urine; a competitive inhibitor of pyridoxal. Synonym: pyramin, pyramine. (05 Mar 2000) |
| toxotes | <zoology> A genus of fishes comprising the archer fishes. See Archer fish. Origin: NL, fr. Gr. An archer. Source: Websters Dictionary (01 Mar 1998) |