ectozoon

[ ek-tuh-zoh-on, -uhn ]

noun

, Biology.

, plural ec·to·zo·a [ek-t, uh, -, zoh, -, uh].

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

Word History and Origins

Origin of ectozoon¹

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

Example Sentences

The most common ectozoon is the hog louse (Hmatopinus suis).

From Project Gutenberg

Another ectozoon, placed by Mgnin and others amongst the lowest types of Arachnida, is the well-known Demodex folliculorum.

From Project Gutenberg