Biohazard

//ˈbaɪəʊˌhæzəd// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A biological hazard; a source of risk due to some biological factor such as bacteria or human waste.

    "The OSHA procedures for this type of environment required all investigative and emergency response personnel to wear PPE when they accessed those areas of the accident site containing biological hazards and undergo decontamination procedures after departing the biohazard area."

  2. 2
    any bacterium or virus or toxin that could be used in biological warfare wordnet
  3. 3
    hazard to humans or the environment resulting from biological agents or conditions wordnet

Synonyms

All synonyms
biological agentbiological agent

Example

More examples

"Tom is wearing a biohazard suit."

Etymology

From bio- + hazard.

Related phrases

biohazard symbolhuman waste

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.