[ri-duhk-teys, -teyz]

noun Biochemistry.

any enzyme acting as a reducing agent.

Origin of reductase

First recorded in 1900–05; reduct(ion) + -ase Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for reductase



any enzyme that catalyses a biochemical reduction reaction

Word Origin for reductase

C20: from reduction + -ase
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

reductase in Medicine


[rĭ-dŭktās′, -tāz′]


An enzyme that promotes reduction of an organic compound.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.