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peroxisome

American  
[puh-rok-suh-sohm] / pəˈrɒk səˌsoʊm /

noun

Cell Biology.

  1. a cell organelle containing catalase, peroxidase, and other oxidative enzymes and performing essential metabolic functions, as the decomposition of fatty acids and hydrogen peroxide.

peroxisome British  
/ pəˈrɒksɪˌsəʊm /

noun

  1. 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
peroxisome Scientific  
/ pə-rŏk′sĭ-sōm′ /

  1. A cell organelle containing enzymes that catalyze the production and breakdown of hydrogen peroxide.

Other Word Forms

  • peroxisomal adjective

Etymology

Origin of peroxisome

First recorded in 1965–70; perox(ide) + -some 3

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"The atomic structures and an understanding of the mechanism of this complex nanomachine now enable us to understand important steps in peroxisome physiology in health and disease," says Gatsogiannis in conclusion.

From Science Daily • Sep. 27, 2023

Defense mechanisms such as detoxification within the peroxisome and certain cellular antioxidants serve to neutralize many of these molecules.

From Textbooks • Jun. 19, 2013

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.