Try Our Apps


Avoid these words. Seriously.


[puh-rok-suh-sohm] /pəˈrɒk səˌsoʊm/
noun, Cell Biology.
a cell organelle containing catalase, peroxidase, and other oxidative enzymes and performing essential metabolic functions, as the decomposition of fatty acids and hydrogen peroxide.
Origin of peroxisome
First recorded in 1965-70; perox(ide)+ -some3
Related forms
peroxisomal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
British Dictionary definitions for peroxisome


a type of organelle present in most eukaryotic cells that carry out oxidative reactions, such as oxidation of alcohol in the liver
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
Cite This Source
peroxisome in Medicine

peroxisome per·ox·i·some (pə-rŏk'sĭ-sōm')
A cell organelle containing enzymes, such as catalase and oxidase, that catalyze the production and breakdown of hydrogen peroxide. Also called microbody.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
peroxisome in Science
A cell organelle containing enzymes that catalyze the production and breakdown of hydrogen peroxide.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for peroxisome

Word Value for peroxisome

Scrabble Words With Friends