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epizoon

or ep·i·zo·ite

[ep-uh-zoh-on, -uh n]
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noun, plural ep·i·zo·a [ep-uh-zoh-uh] /ˌɛp əˈzoʊ ə/. Biology.
  1. an external parasite or commensal on the body of an animal; ectozoon.
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Origin of epizoon

From New Latin, dating back to 1830–40; see origin at epi-, -zoon
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for epizoite

epizoite

noun
  1. an organism that lives on an animal but is not parasitic on it
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epizoon

noun plural -zoa (-ˈzəʊə)
  1. an animal, such as a parasite, that lives on the body of another animal
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Derived Formsepizoan, adjective

Word Origin

C19: New Latin, from epi- + Greek zōion animal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

epizoite in Medicine

epizoon

(ĕp′ĭ-zōŏn, -ən)
n. pl. ep•i•zo•a (-zōə)
  1. An epizoic organism.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.