biohazard

noun

1. a pathogen, especially one used in or produced by biological research.
2. the health risk posed by the possible release of such a pathogen into the environment.

noun

1. material of biological origin that is hazardous to humans

n.

1. A biological agent, such as a virus or a condition that constitutes a threat to humans, especially in biological research or experimentation.
2. The potential danger or harm from exposure to such an agent or condition.

1. 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.