Dictionary![]() ![]() ga•lac•tosePronunciation: (gu-lak'tōs), [key] —n. Chem. a white, crystalline, water-soluble hexose sugar, C6H12O6, 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.
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