- an enzyme in the saliva that converts starch into dextrin and maltose.
Origin of ptyalin
1835–45; < Greek ptýal(on) spittle, saliva + -in2
Also called salivary amylase.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- biochem an amylase secreted in the saliva of man and other animals
C19: from Greek ptualon saliva, from ptuein to spit
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
- An amylase present in saliva that catalyzes the hydrolysis of starch into maltose and dextrin.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- An enzyme found in the saliva of humans and herbivorous animals that helps in the predigestion of starches. Ptyalin is a type of amylase.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.