choroid

views updated May 14 2018

cho·roid / ˈkôrˌoid/ (also cho·ri·oid / ˈkôrēˌoid/ ) • adj. resembling the chorion, particularly in containing many blood vessels.• n. (also choroid coat) the pigmented vascular layer of the eyeball between the retina and the sclera.DERIVATIVES: cho·roi·dal / kəˈroidl/ adj. .

choroid

views updated May 29 2018

choroid A pigmented layer, rich in blood vessels, that lies between the retina and the sclerotic of the vertebrate eye. At the front of the eye the choroid is modified to form the ciliary body and the iris.

choroid

views updated May 23 2018

choroid (ko-roid) n. the layer of the eyeball between the retina and the sclera. It contains blood vessels and a pigment that absorbs excess light and so prevents blurring of vision. See eye.
choroidal (kŏ-roid-ăl) adj.

choroid

views updated May 11 2018

choroid In the eye of a vertebrate, a layer of tissue lying immediately outside the retina that contains pigment and blood vessels.