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a suffix used in the names of enzymes:
Origin of -ase
extracted from diastase Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for ASE
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British Dictionary definitions for ASE


indicating an enzyme: oxidase
Word Origin
abstracted from diastase
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for ASE


word-forming element used in naming enzymes, from ending of diastase.

Online Etymology Dictionary, © 2010 Douglas Harper
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ASE in Medicine

-ase suff.
Enzyme: amylase.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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ASE in Science
A suffix used to form the names of enzymes. It is often added to the name of the compound that the enzyme breaks down, as in lactase, which breaks down lactose. It is also added to a word describing the enzyme's activity, as in transferase, which catalyzes the transfer of a chemical group from one molecule to another, or reductase, which catalyzes the reduction of an organic compound.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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