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The Collaborative International Dictionary
Choanoid

Choanoid \Cho"a*noid\, a. [Gr. choa`nh funnel + -oid.] (Anat.) Funnel-shaped; -- applied particularly to a hollow muscle attached to the ball of the eye in many reptiles and mammals.

Wiktionary
choanoid

a. (context anatomy English) funnel-shaped; applied particularly to a hollow muscle attached to the eyeball in many reptiles and mammals