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ectozoon

[ek-tuh-zoh-on, -uh n] /ˌɛk təˈzoʊ ɒn, -ən/
noun, plural ectozoa
[ek-tuh-zoh-uh] /ˌɛk təˈzoʊ ə/ (Show IPA). Biology.
1.
any animal parasite, as the louse, that lives on the surface of its host (opposed to entozoon).
Also, ectozoan.
Origin of ectozoon
1855-1860
First recorded in 1855-60; ecto- + -zoon
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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ectozoon in Medicine

ectozoon ec·to·zo·on (ěk'tə-zō'ŏn')
n. pl. ec·to·zo·a (-zō'ə)
An animal parasite, such as a flea or louse, living on the exterior of the host organism.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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