n.
Pronunciation: ' ko ̇ r- ˌ o ̇ id
Variant: also cho · ri · oid \ ' ko ̇ r- ē - ˌ o ̇ id \
Function: noun
Etymology: New Latin choroides resembling the chorion, from Greek chorioeid ē s, from chorion chorion
Date: 1683
: a vascular membrane containing large branched pigmented cells that lies between the retina and the sclera of the vertebrate eye ― called also choroid coat ― see EYE illustration
– choroid or cho · roi · dal \ k ə - ' ro ̇ i-d ə l \ adjective