/ Dictionary / Index G galactose: Meaning and Definition of Find definitions for: ga•lac•tose Pronunciation: (gu-lak'tōs), [key] — n. Chem. a white, crystalline, water-soluble hexose sugar, CHO, obtained in its dextrorotatory form from milk sugar by hydrolysis and in its levorotatory form from mucilages. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: galactose (Thesaurus) galactoscope galactosemia Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language