/ Dictionary / Index G galactosan: Meaning and Definition of Find definitions for: ga•lac•to•san Pronunciation: (gu-lak"tu-san", -sun), [key] — n. galactan. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. galactosamine galactoscope Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language