[ dahy-uh-steys, -steyz ]
/ ˈdaɪ əˌsteɪs, -ˌsteɪz /

an enzyme that breaks down starch into maltose, then dextrose, and is present in malt.

Origin of diastase

< French diastase (1833) < Greek diástasis; see diastasis, -ase
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for diastase

British Dictionary definitions for diastase


/ (ˈdaɪəˌsteɪs, -ˌsteɪz) /


any of a group of enzymes that hydrolyse starch to maltose. They are present in germinated barley and in the pancreasSee also amylase
Derived Formsdiastasic, adjective

Word Origin for diastase

C19: from French, from Greek diastasis a separation; see diastasis
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

Word Origin and History for diastase



enzyme or group of enzymes found in a seed and capable of converting starch into sugar, coined 1833 by Payen and Persoz from Greek diastasis "a setting apart," from dia- "across" (see dia-) + stasis "a standing" (see stasis).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for diastase


[ dīə-stās′, -stāz′ ]


An amylase or a mixture of amylases that converts starch to dextrin and maltose, is found in certain germinating grains such as malt, and is used to make soluble starches, to aid the digestion of starches, and to digest glycogen in histological sections.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.