Designating a foreign and usually harmful substance or organism in a biological system. Xenobiotic, derived from the Greek root xeno, meaning "stranger" or "foreign," and bio, meaning "life," describes some...

An adjective used to describe a chemical that is alien to a particular biological...

Those compounds which do not occur...

A xenobiotic is a chemical which is found in an organism but which is not normally produced or expected to be present in it. It can also cover substances which are present in much higher concentrations than are usual. Specifically, drugs such as...