from The American Heritage® Dictionary of the English Language, 5th Edition.

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

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun 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.

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


from Wiktionary, Creative Commons Attribution/Share-Alike License

bio- +‎ hazard



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