/ Dictionary / Index A aminase: Meaning and Definition of Find definitions for: am•i•nase Pronunciation: (am'u-nās", -nāz"), [key] — n. Biochem. any of a group of enzymes that catalyze the hydrolysis of amino compounds, releasing the amino group and liberating nitrogen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Aminah aminate Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language