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definitions
  • synonyms

b and w

or B and W, b&w, B&W

See more synonyms on Thesaurus.com
adjective
  1. (of a motion picture, photograph, drawing, etc.) black and white, as distinguished from color.
noun
  1. a black and white motion picture, photograph, drawing, etc.

biological warfare

noun
  1. warfare that makes use of bacteria, viruses, toxins, etc., to disable or destroy people, domestic animals, and food crops. Abbreviation: B.W.

Origin of biological warfare

First recorded in 1945–50
Also called biowarfare, germ warfare.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for b.w.

biological warfare

noun
  1. the use of living organisms or their toxic products to induce death or incapacity in humans and animals and damage to plant crops, etcAbbreviation: BW
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

b.w. in Medicine

biological warfare

n.
  1. The use of disease-producing microorganisms, toxic biological products, or organic biocides to cause death or injury to humans, animals, or plants.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

b.w. in Culture

biological warfare

The use of biological agents as weapons in warfare. Also called germ warfare.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.