Why was "tantrum" trending last week?
ciliary muscle n.
A smooth muscle of the ciliary body of the eye, consisting of circular fibers and radiating fibers, and whose action changes the shape of lens in the process of accommodation.
muscle of the ciliary body of the eye, between the sclera (white of the eye) and the fine ligaments that suspend the lens. It is composed of both longitudinal and circular fibres and serves to change the shape of the lens, enabling the eye to focus upon near or distant objects.