pterygium

n., pl., -i·ums, or -i·a (-ē-ə).
An abnormal mass of tissue arising from the conjunctiva of the inner corner of the eye that obstructs vision by growing over the cornea.

[New Latin, from Greek pterugion, diminutive of pterux, pterug-, wing. See pterygoid.]

pterygial pte·ryg'i·al (-əl) adj.

(tə-rĭj'ē-əm)
n., pl. -i·ums or pte·ryg·i·a (-ē-ə).

An abnormal mass of tissue arising from the conjunctiva of the inner corner of the eye that obstructs vision by growing over the cornea.

pte·ryg'i·al adj.

A winglike structure, especially an abnormal triangular fold of membrane in the interpalpebral fissure, extending from the conjunctiva to the cornea.

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The noun has one meaning:

Meaning #1: a thickened triangular layer of conjunctiva extending from the nasal edge of the eye to the cornea; pterygia arise from irritation of the pinguecula

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