conjunctiva

n. mucus membrane on the eyeball and eyelids

The conjunctiva is a membrane that covers the sclera (white part of the eye) and lines the inside of the eyelids.
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Conjunctiva /con·junc·ti·va/ pl. conjunc´tivae [L.] the delicate membrane lining the eyelids and covering the eyeball. [more]Conjunctiva - Community and Resources

Noun
1. a transparent membrane covering the eyeball and under surface of the eyelid
(hypernym) mucous membrane, mucosa
(hyponym) bulbar conjunctiva, conjunctival layer of bulb, tunica conjunctiva bulbi
(part-holonym) eye, oculus, optic

n. conjunctiva, mucus membrane on the eyeball and eyelids