biohazard: meaning, definition, pronunciation and examples
Low FrequencyScientific, Technical, Formal, Media
Quick answer
What does “biohazard” mean?
A biological substance or organism that poses a threat to human or environmental health, such as a pathogenic microorganism or its toxin.
Audio
Pronunciation
Definition
Meaning and Definition
A biological substance or organism that poses a threat to human or environmental health, such as a pathogenic microorganism or its toxin.
A broader category for any biological risk or situation that could cause harm, including medical waste, genetically modified organisms, and contaminated samples.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. The word is equally recognized and used in professional and media contexts in both varieties.
Connotations
Strongly linked to science fiction, public health emergencies, and laboratory safety. Connotes high-level risk and containment.
Frequency
Comparatively low frequency in everyday conversation but high recognition, especially post-COVID-19.
Grammar
How to Use “biohazard” in a Sentence
[verb] a biohazard: contain, handle, dispose of, identify, label, pose, representa biohazard [verb]: arises, exists, spreadsbiohazard [noun]: biohazard management, biohazard threat, biohazard riskVocabulary
Collocations
Examples
Examples of “biohazard” in a Sentence
verb
British English
- The lab is equipped to safely biohazard any infectious samples.
- Procedures are in place to biohazard the waste before transport.
American English
- The protocol requires us to biohazard all Level 3 materials.
- They failed to properly biohazard the contaminated equipment.
adverb
British English
- The area was treated biohazardously after the outbreak.
- The materials were handled biohazardly, contrary to regulations.
American English
- The spill was cleaned up biohazardously to prevent infection.
- He acted biohazardly by not using gloves.
adjective
British English
- The biohazard waste was incinerated on-site.
- She wore full biohazard gear for the procedure.
American English
- All biohazard materials must be placed in red bags.
- They entered the biohazard zone with caution.
Usage
Meaning in Context
Business
Used in contracts or policies for waste management, laboratory services, and insurance.
Academic
Used in research papers on microbiology, epidemiology, and public health.
Everyday
Rare; used when discussing news about diseases, dangerous spills, or very messy situations.
Technical
Central term in biosafety manuals, risk assessments, and hazardous materials handling.
Vocabulary
Synonyms of “biohazard”
Strong
Neutral
Vocabulary
Antonyms of “biohazard”
Watch out
Common Mistakes When Using “biohazard”
- Incorrectly used for non-biological chemical spills (e.g., 'The oil spill was a biohazard').
- Misspelling as 'bio-hazzard'.
- Using in overly casual contexts where 'germs' or 'mess' would suffice.
FAQ
Frequently Asked Questions
No. While often associated with serious pathogens, it also applies to medical waste, contaminated samples, and other biological materials that pose a risk, even if not necessarily lethal.
A 'hazard' is any source of potential harm. A 'biohazard' is a specific type of hazard where the harmful agent is biological in nature (e.g., bacteria, viruses, toxins).
Yes, though it is less common and highly technical. It means to treat or classify something as a biohazard (e.g., 'All infectious samples must be biohazarded').
It is a trefoil (a three-lobed symbol) made of three interlocking circles, typically in fluorescent orange or red on a contrasting background. It was designed in 1966 for maximum recognisability.
A biological substance or organism that poses a threat to human or environmental health, such as a pathogenic microorganism or its toxin.
Biohazard is usually scientific, technical, formal, media in register.
Biohazard: in British English it is pronounced /ˈbaɪ.əʊˌhæz.əd/, and in American English it is pronounced /ˈbaɪ.oʊˌhæz.ɚd/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “['dressed up like a'] biohazard suit (humorous: wearing excessive protective gear)”
- “['it's a'] biohazard zone (a very messy or dangerous place)”
Learning
Memory Aids
Mnemonic
BIO (life) + HAZARD (danger) = DANGER FROM LIVING THINGS. Picture the bright yellow and black biohazard symbol on a lab door.
Conceptual Metaphor
DANGER IS A CONTAMINANT / DANGER IS A CONTAINED SUBSTANCE.
Practice
Quiz
Which of the following is MOST LIKELY to be labelled a 'biohazard'?