The definition of heterogenous refers to something originating outside of the body, or to things that are not from the same source.
(adjective)Proteins that originate and are found outside of the body are an example of something that would be described as heterogenous.
See heterogenous in Webster's New World College Dictionary
adjective
Origin: hetero- + -genous
See heterogenous in American Heritage Dictionary 4
adjective
Related Forms:
Learn more about heterogenous