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[ek-tuh-zoh-on, -uh n] /ˌɛk təˈzoʊ ɒn, -ən/
noun, plural ectozoa
[ek-tuh-zoh-uh] /ˌɛk təˈzoʊ ə/ (Show IPA).
any animal parasite, as the louse, that lives on the surface of its host (opposed to entozoon).
Also, ectozoan.
Origin of ectozoon
1855-60; ecto- + -zoon Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for ectozoa
Historical Examples
  • The ectozoa of ruminants have received much attention, but I can merely indicate the known forms.

    Parasites T. Spencer Cobbold
  • It conveniently stands thus, moreover, in direct contradiction to the term ectozoa.

    Parasites T. Spencer Cobbold
  • In reference to the ectozoa of rodents it may be said that they are very numerous.

    Parasites T. Spencer Cobbold
  • The ectozoa of the dog, though not numerous as species, are of importance in relation to mange.

    Parasites T. Spencer Cobbold
  • The ectozoa of birds are too numerous to be dealt with in these pages.

    Parasites T. Spencer Cobbold
  • In like manner a great deal has been written respecting the ectozoa of fishes.

    Parasites T. Spencer Cobbold
ectozoa 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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