ectozoon

[ek-tuh-zoh-on, -uh n]

noun, plural ec·to·zo·a

[ek-tuh-zoh-uh] /ˌɛk təˈzoʊ ə/. Biology.

any animal parasite, as the louse, that lives on the surface of its host (opposed to entozoon).

Origin of ectozoon

First recorded in 1855–60; ecto- + -zoon

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

ectozoon in Medicine

(ĕk′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.