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A microorganism that causes disease in personnel, plants, or animals or causes the deterioration of materiel. See also biological operation; biological weapon; chemical agent.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
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|Noun||1.||biological agent - any bacterium or virus or toxin that could be used in biological warfare|
agent - an active and efficient cause; capable of producing a certain effect; "their research uncovered new disease agents"
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