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n. pl. en·to·zo·a (-zō′ə)
Any of various animals, such as tapeworms or trematodes, that inhabit the internal organs or tissues of other animals, usually as parasites.

en′to·zo′ic adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
Observations on Entozoa, with notices of several species, including an account of two experiments in regards to the breeding of Taenia serrata and T.
Description of some new species of intestinal worms (entozoa) in the collection of the British Museum.