NCI Dictionary of Cancer Terms
The NCI Dictionary of Cancer Terms features 8,327 terms related to cancer and medicine.
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- listen (YOO-vee-uh)
- The middle layer of the wall of the eye. The uvea has 3 main parts: (1) the choroid (the tissue layer filled with blood vessels); (2) the ciliary body (the ring of muscle tissue that changes the size of the pupil and the shape of the lens); and (3) the iris (the colored part of the eye). Also called uveal tract.