• synonyms


[ahy-som-uh-reys, -reyz]
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noun Biochemistry.
  1. any of a class of enzymes that catalyze reactions involving intramolecular rearrangements.

Origin of isomerase

First recorded in 1940–45; isomer + -ase
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for isomerase


  1. any enzyme that catalyses the conversion of one isomeric form of a compound to another
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

isomerase in Medicine

glucosephosphate isomerase deficiency

  1. An inherited enzyme deficiency characterized by chronic homolytic anemia.phosphohexose isomerase deficiency
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.