Try Our Apps


What does the eggplant emoji really mean?


[bahy-oh-haz-erd] /ˈbaɪ oʊˌhæz ərd/
a pathogen, especially one used in or produced by biological research.
the health risk posed by the possible release of such a pathogen into the environment.
Origin of biohazard
Related forms
biohazardous, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for biohazard
Contemporary Examples
British Dictionary definitions for biohazard


material of biological origin that is hazardous to humans
Derived Forms
biohazardous, adjective
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
Cite This Source
Word Origin and History for biohazard

also bio-hazard, 1973, from bio- + hazard (n.).

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
biohazard in Medicine

biohazard bi·o·haz·ard (bī'ō-hāz'ərd)

  1. A biological agent, such as a virus or a condition that constitutes a threat to humans, especially in biological research or experimentation.

  2. The potential danger or harm from exposure to such an agent or condition.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
biohazard in Science
A biological agent, such as an infectious microorganism, that constitutes a threat to humans or to the environment, especially one produced in biological research or experimentation.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for biohazard

Difficulty index for biohazard

Few English speakers likely know this word

Word Value for biohazard

Scrabble Words With Friends