biohazard
noun
bio·haz·ard
ˈbī-ō-ˌha-zərd 
: a biological agent or condition that is a hazard to humans or the environment
also
: a hazard posed by such an agent or condition
Examples of biohazard in a Sentence
The gasoline spill created a serious biohazard.
Recent Examples on the Web
In hazardous settings—such as disaster zones, mines or biohazard facilities—humanoids can undertake dangerous tasks, thereby reducing the risk to humans.
—
Ashutosh Saxena, Forbes.com, 29 Aug. 2025
My world became sterile gauze, saline flushes, biohazard bins.
—Big Think, 20 Aug. 2025
The sprayer should then be properly disposed of in a sharps or biohazard container.
—Vanessa Etienne, People.com, 18 Aug. 2025
No one wants to encounter a bathroom that looks like a biohazard.
—Libby Monteith Minor, Southern Living, 20 July 2025
See All Example Sentences for biohazard
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Ashutosh Saxena, Forbes.com, 29 Aug. 2025
My world became sterile gauze, saline flushes, biohazard bins.
—Big Think, 20 Aug. 2025
The sprayer should then be properly disposed of in a sharps or biohazard container.
—Vanessa Etienne, People.com, 18 Aug. 2025
No one wants to encounter a bathroom that looks like a biohazard.
—Libby Monteith Minor, Southern Living, 20 July 2025
See All Example Sentences for biohazard
Cite this Entry
“Biohazard.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/biohazard. Accessed 9 Sep. 2025.
Copy CitationMedical Definition
biohazard
noun
bio·haz·ard
ˈbī-ō-ˌhaz-ərd, -ˈhaz-
: a biological agent or condition (as an infectious organism or insecure laboratory procedures) that constitutes a hazard to humans or the environment
also
: a hazard posed by such an agent or condition
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