ˈleˌvan noun
( -s )
Etymology: lev- + -an
: any of a group of sparingly soluble levorotatory polysaccharides (C 6 H 10 O 5 ) n composed of levulose units of the furanose type and formed especially from sucrose solutions by the action of various bacteria (as Bacillus subtilis or B. mesentericus ) — compare dextran