noun
biohazard
BEYE-oh-ha-zuhd
noun
1
A biological substance, such as bacteria, a virus, or human waste, that poses a risk to health.
"The lab disposed of the samples in a marked biohazard bin."
How to Use Biohazard
Learner’s notesIn plain EnglishSomething biological — like infected material or contaminated waste — that could make you sick.
Common pairings
biohazard symbol
biohazard waste
biohazard suit
Word Forms
biohazards plural
Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “biohazard”
A quick quiz — meaning, synonyms & usage
→
Fill the Gap
Can you complete this real example?
The lab disposed of the samples in a marked _____ bin.
Etymology
A compound of "bio-" (life/living) and "hazard," coined in the mid-20th century as biological safety became a formal field.