[ bahy-uh-sahyd ]
/ ˈbaɪ əˌsaɪd /


any chemical that destroys life by poisoning, especially a pesticide, herbicide, or fungicide.

Origin of biocide

First recorded in 1945–50; bio- + -cide

Related forms

bi·o·cid·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for biocidal


/ (ˈbaɪəˌsaɪd) /


a chemical, such as a pesticide, capable of killing living organisms

Derived Forms

biocidal, adjective
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

Medicine definitions for biocidal


[ bī′ə-sīdl ]


Of or relating to an agent that is destructive to living organisms.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for biocidal


[ bīə-sīd′ ]

A chemical agent, such as a pesticide or herbicide, that is capable of destroying living organisms.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.