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

Nearby words

  1. biochemical profile,
  2. biochemist,
  3. biochemistry,
  4. biochip,
  5. biocidal,
  6. bioclastic,
  7. bioclean,
  8. bioclimatic,
  9. bioclimatology,
  10. biocoenology

Origin of biocide

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

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

British Dictionary definitions for biocidal



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

Word Origin and History for biocidal



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

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for biocidal




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



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.