lactase Hear it!

lactase definition

lac·tase (lak′tās′)

noun

an enzyme, present in certain yeasts and in the intestines of animals, which splits lactose into glucose and galactose

Etymology: lact(o)- + (diast)ase

Webster's New World College Dictionary Copyright © 2005 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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