| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| a scrap or morsel of food left at a meal. |
biohazard bi·o·haz·ard (bī'ō-hāz'ərd)
n.
A biological agent, such as a virus or a condition that constitutes a threat to humans, especially in biological research or experimentation.
The potential danger or harm from exposure to such an agent or condition.
| 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. |