amylase

[am-uh-leys, -leyz]
noun Biochemistry.
1.
any of a widely distributed class of enzymes that catalyze the hydrolysis of starch, glycogen, and related polysaccharides to oligosaccharides, maltose, or glucose.
2.
any of several digestive enzymes that break down starches.

Origin:
1890–95; amyl- + -ase

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To amylase
Collins
World English Dictionary
amylase (ˈæmɪˌleɪz)
 
n
any of several enzymes that hydrolyse starch and glycogen to simple sugars, such as glucose. They are present in saliva

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

amylase
1893, from amyl + chemical suffix -ase.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

amylase am·y·lase (ām'ə-lās', -lāz')
n.
Any of a group of enzymes that catalyze the hydrolysis of starch to sugar to produce carbohydrate derivatives.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
American Heritage
Science Dictionary
amylase   (ām'ə-lās')  Pronunciation Key 
Any of various enzymes that cause starches to break down into smaller sugars, especially maltose, by hydrolysis. There are two types of amylases, alpha-amylases and beta-amylases. In humans, an alpha-amylase known as ptyalin is present in saliva and is also produced by the pancreas for secretion into the small intestine. Beta-amylases are found in bacteria, molds, yeasts, and the seeds of plants.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Encyclopedia Britannica
Encyclopedia

amylase

any member of a class of enzymes that catalyze the hydrolysis (splitting of a compound by addition of a water molecule) of starch into smaller carbohydrate molecules such as maltose (a molecule composed of two glucose molecules). Two categories of amylases, denoted alpha and beta, differ in the way they attack the bonds of the starch molecules.

Learn more about amylase with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
Cite This Source
Example sentences
High-fructose corn syrup is corn syrup treated with amylase and other enzymes, which together help convert glucose into fructose.
When the pancreas is diseased or inflamed, amylase releases into the blood.
Alpha-amylase, a key protein in saliva, would be effective at disintegrating carbohydrate clogs.
Related Words
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature
FAVORITES
RECENT

;