Question

consulting a dictionary
read the excerpt from the hot zone by richard preston. then, use an online dictionary to find the meaning of the word biohazard.
a military biohazard operation was about to go down in a suburb of washington, and he sure as hell didnt want the post to find out about it.

• the hot zone, richard preston

access the dictionary here.
what is a biohazard?
a type of science that deals with things that are alive and dangerous
an accident or tragic event that happens by chance, resulting in a new life - form
a biological or chemical substance that is dangerous to humans and the environment
a story of the life of a real person who lived very dangerously

Explanation:

A biohazard is defined as a biological or chemical substance that poses a risk to humans and the environment. This is consistent with the scientific understanding of biohazards which include pathogens, toxins etc.

Answer:

a biological or chemical substance that is dangerous to humans and the environment