Definition of "germ warfare" []

• The use of injurious microorganisms, such as bacteria or viruses, as weapons in warfare. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I recruited him to a small subsidiary of mine, PicoMed Pharmaceuticals, where Watson thought he would be working on a germ warfare project for the Pentagon."
• "Wait until your child seems more rational before you explain to him that you have to let the mailman whom he has decided is engaging in germ warfare because he once saw him picking his nose before coming to your house deliver the mail because without mail delivery, he won’t get his Ranger Rick magazine."