choroid(n = noun.body)choroid coat - a highly vascular membrane in the eye between the retina and the sclera; a dark pigmentation minimizes the scattering of light inside the eye;
resembling the chorion; as, the choroid plexuses of the ventricles of the brain, and the choroid coat of the eyeball. [1913 Webster]
Choroid plexus(Anat.), one of the delicate fringelike processes, consisting almost entirely of blood vessels, which project into the ventricles of the brain.
, adj. & n.
--adj. like a chorion in shape or vascularity.
--n. (in full choroid coat or membrane) a layer of the eyeball between the retina and the sclera.