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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A biological agent, such as an infectious microorganism, or a condition that constitutes a threat to humans, especially in biological research or experimentation.
  • n. The potential danger, risk, or harm from exposure to such an agent or condition.

from Wiktionary, Creative Commons Attribution/Share-Alike License

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

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

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


bio- +‎ hazard (Wiktionary)



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