What is "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.

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