[kawr-oid, kohr-]Anatomy
Also cho·roi·dal, chorioid, chorioidal.

Origin of choroid

1625–35; < Greek choroeidḗs false reading for chorioeidḗs chorioid
Related formspre·cho·roid, adjectivesub·cho·roid, adjectivesub·cho·roi·dal, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for choroid

Historical Examples of choroid

British Dictionary definitions for choroid


chorioid (ˈkɔːrɪˌɔɪd)

  1. resembling the chorion, esp in being vascular
  1. the brownish vascular membrane of the eyeball between the sclera and the retina

Word Origin for choroid

C18: from Greek khoroeidēs, erroneously for khorioeidēs, from chorion
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for choroid

1680s, from Latinized form of Greek khoroeides, a corruption of khorioeides, from khorion (see chorion) + eidos "resemblance" (see -oid).

Online Etymology Dictionary, © 2010 Douglas Harper

choroid in Medicine


  1. The dark-brown vascular coat of the eye between the sclera and the retina.
  1. Relating to the chorion or corium.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

choroid in Science


  1. The dark-brown vascular coat of the eye between the sclera and the retina.
  1. Resembling the chorion; membranous.
  2. Relating to or involving the choroid of the eye.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.