NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 7,957 terms related to cancer and medicine.
- ciliary body
- listen (SIH-lee-ayr-ee BAH-dee)
A part of the middle layer of the wall of the eye. The ciliary body includes the ring-shaped muscle that changes the size of the pupil and the shape of the lens when the eye focuses. It also makes the fluid that fills the eye.