Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The mucous membrane that lines the inner surface of the eyelid and the exposed surface of the eyeball.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A clear mucous membrane that lines the inner surface of the eyelid and the exposed surface of the eyeball or sclera.

from the GNU version of the Collaborative International Dictionary of English

  • n. The mucous membrane which covers the external surface of the ball of the eye and the inner surface of the lids; the conjunctival membrane.

from The Century Dictionary and Cyclopedia

  • n. In anat, the mucous membrane which lines the inner surface of the eyelids and thence is reflected over the front of the eyeball, thus conjoining the lids and the globe of the eye: a contraction of tunica conjunctiva.
  • n. In entom., the membrane uniting two sclerites, or hard parts of the integument, which move freely on each other.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a transparent lubricating mucous membrane that covers the eyeball and the under surface of the eyelid

Etymologies

Middle English, from Medieval Latin (membrāna) coniūnctīva, connective (membrane), feminine of Late Latin coniūnctīvus, connective, from Latin coniūnctus, past participle of coniungere, to join together; see conjoin.
(American Heritage® Dictionary of the English Language, Fourth Edition)

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