b and w
or B and W, b&w, B&W
- (of a motion picture, photograph, drawing, etc.) black and white, as distinguished from color.
- a black and white motion picture, photograph, drawing, etc.
- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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
- 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.
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.