any of a group of organelles in some cells of mammals, the leaves of plants, etc., containing enzymes that produce and then decompose hydrogen peroxide and carry out other aspects of cellular metabolism
Origin of peroxisomefrom peroxide + -some
A cell organelle containing a large number of enzymes, including catalase and oxidase, that break down long-chain fatty acids and other organic molecules. The hydrogen peroxide produced by these reactions is also broken down within the peroxisome.
Origin of peroxisomeperoxi(de) -some 3