bio-hazardous

Science Dictionary
biohazard   (bī'ō-hāz'ərd)  Pronunciation Key 
A biological agent, such as an infectious microorganism, that constitutes a threat to humans or to the environment, especially one produced in biological research or experimentation.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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