any enzyme that catalyzes the introduction of a hydroxyl group into a substance.
Origin of hydroxylase
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Any of various enzymes that catalyze the formation of hydroxyl groups by oxidation of the substrate.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.