a pigmented, highly vascular membrane of the eye that is continuous with the iris and lies between the sclera and the retina, functioning to nourish the retina and absorb scattered light.
cho·roid (kôr'oid', kōr'-) n. The dark-brown vascular coat of the eye between the sclera and the retina. Also called choroid coat, choroid membrane. adj.
Resembling the chorion; membranous.
Of or relating to the choroid.
[From Greek khoroeidēs, like an afterbirth, alteration of khorioeidēs : khorion, afterbirth; see chorion + -oeidēs, -oid.]