'polysaccharide' definitions:

Definition of 'polysaccharide'

noun

Any of a class of carbohydrates whose molecules contain chains of monosaccharide molecules [syn: polysaccharide, polyose]

From: GCIDE

macromolecule \mac`ro*mol"e*cule\, n. (Chem., Biochem.) A very large molecule, especially a polymer having from hundreds to many thousands of atoms, such as DNA, RNA, protein, polysaccharide, polyethylene, polycarbonate, etc. [PJC]