Main Entry: en·do·tox·in

Pronunciation: \ˌen-dō-ˈtäk-sən\

Function: noun

: a toxin of internal origin ; specifically : a poisonous substance present in bacteria (as the causative agent of typhoid fever) but separable from the cell body only on its disintegration—compare exotoxin

—en·do·tox·ic \-sik\ adjective