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

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


Discover The Influence Of Portuguese On English Via This Quiz!
We’ve gathered some interesting words donated to English from Portuguese … as well as some that just don’t translate at all. Do you know what they mean?
Question 1 of 11
Which of the following animal names traces its immediate origin to Portuguese?

Origin of diastase

< French diastase (1833) < Greek diástasis; see diastasis, -ase
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences 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 forms of diastase

diastasic, 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

Medical 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.