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choroid

cho·roid [ káw ròyd ]


noun  (plural cho·roids)
Definition:
 
membrane of the eye: a brownish membrane between the retina and the white of the eye in vertebrates that contains blood vessels and large pigmented cells



adjective 
Definition:
 
like the chorion: resembling the chorion in being vascular or membranous

[Mid-17th century. < Greek khoroeidēs< khorion "chorion"]
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