'Trisaccharide' definitions:

Definition of 'trisaccharide'

noun

Any of a variety of carbohydrates that yield three monosaccharide molecules on complete hydrolysis

From: GCIDE

Trisaccharide \Tri*sac"cha*ride\, n. Also -rid \-rid\ (Chem.) A complex sugar, as raffinose, yielding by hydrolysis three simple sugar molecules. [Webster 1913 Suppl.]