. | any animal parasite, as an intestinal worm, that lives within the body of its host (opposed to ectozoon ). |
entozoon en·to·zo·on (ěn'tə-zō'ŏn')
n. pl. en·to·zo·a (-zō'ə)
An animal parasite, such as a tapeworm or liver fluke, inhabiting any of the internal organs or tissues.