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Definition of biohazard

biohazard

/ˈbaɪ.oʊˌhæz.ɚd/
bi · o · haz · ard
Plural:biohazards
•
Adjective:biohazardous
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biohazard Lexical Profile

biohazard Game Scores & Validity

• noun

1

A biological agent or condition, such as an infectious microorganism, toxin, or contaminated medical waste, that poses a threat to human health or the environment.

Example

"Hospital technicians must seal used needles and blood samples in labeled containers to prevent exposure to any potential biohazard."

Synonyms
View all synonyms for biohazard

• Nearby Words

biographical
biographically
biography
biohazard
biohazardous
biologic
biological

Word Origin & Etymology

Coined in the 1960s as a blend of "biological" and "hazard," when environmental engineers at Dow Chemical and the U.S. National Institutes of Health developed the standardized warning symbol for infectious agents.

Cite this Entry

Wordmom. (2026). Definition of Biohazard. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/biohazard
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