The Collaborative International Dictionary of English v.0.48:
Triose \Tri"ose\, n. [Tri- + -ose.] (Chem.) (a) A sugar derived from a trihydric alcohol. (b) A trisaccharide. [Webster 1913 Suppl.]WordNet (r) 3.0 (2006):
triose n 1: any monosaccharide sugar containing three atoms of carbon per molecule