bio·​threat ¦bī-(ˌ)ō-¦thret How to pronounce biothreat (audio)
plural biothreats
: a threat posed by a harmful biological agent
In 2001, a $3 million contract … funded research to develop vaccines against biothreats by activating and targeting dendritic cells. Robert Miller, Dallas Morning News, 28 Oct. 2007
Gingrich and Sanders conclude that biothreats are four times as dangerous as nuclear and chemical threats combined. Norman G. Anderson, Seattle Post-Intelligencer, 27 Feb. 2005
Biothreat protection requires the mask to have an airtight seal around your nose and mouth, and, sometimes, your eyes. Consumer Reports, February 2002

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Word History


bi- entry 2 + threat

First Known Use

1984, in the meaning defined above

Time Traveler
The first known use of biothreat was in 1984

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Dictionary Entries Near biothreat

Cite this Entry

“Biothreat.” Dictionary, Merriam-Webster, Accessed 29 Sep. 2022.

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