Medical Definition of ciliary muscle
: a circular band of smooth muscle fibers situated in the ciliary body and serving as the chief agent in accommodation when it contracts by drawing the ciliary processes centripetally and relaxing the suspensory ligament of the lens so that the lens is permitted to become more convex
Seen and Heard
What made you want to look up ciliary muscle? Please tell us where you read or heard it (including the quote, if possible).