pterygium
English Thesaurus
1. either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the cornea; it arises from irritation of the pinguecula (noun.body)
| hypernym | : | conjunctiva, |
| definition | : | a transparent lubricating mucous membrane that covers the eyeball and the under surface of the eyelid (noun.body) |
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