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[bahy-uh-sahyd] /ˈbaɪ əˌsaɪd/
any chemical that destroys life by poisoning, especially a pesticide, herbicide, or fungicide.
Origin of biocide
1945-50; bio- + -cide
Related forms
biocidal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for biocide
  • Formaldehyde, being a biocide as well as a carcinogen, kills bacteria that may be lurking in the shampoo.
  • Valiant attempts will certainly be made to defend the motives and methods of biocide users.
  • If a biocide is used, follow the manufacturer's instructions for proper neutralization.
  • It is also used as a biocide for cutting oils and aqueous systems such as leather tanning and paper manufacturing.
  • Use an accepted chemical disinfectant such as chlorine or an acceptable biocide treatment to clean the system.
  • Cleaning followed by biocide treatment of the system, if appropriate.
  • In addition, when fuel oil is stored for extended periods, a biocide may be added to prevent fouling.
British Dictionary definitions for biocide


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
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Word Origin and History for biocide

"destruction of living tissue or living species," 1947, from bio- + -cide.

Online Etymology Dictionary, © 2010 Douglas Harper
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biocide in Science
A chemical agent, such as a pesticide or herbicide, that is capable of destroying living organisms.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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