[rahy-boh-noo-klee-eys, -eyz, -nyoo-]

noun Biochemistry.

any of the class of enzymes that catalyze the hydrolysis of RNA.

Origin of ribonuclease

First recorded in 1940–45; ribonucle(ic acid) + -ase
Also called RNase, RNAase.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for ribonuclease



any of a group of enzymes that catalyse the hydrolysis of RNA

Word Origin for ribonuclease

C20: from ribonucle (ic acid) + -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

ribonuclease in Medicine


[rī′bō-nōōklē-ās′, -āz′]


Any of various enzymes that catalyze the hydrolysis of RNA.RNase
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.