Adjacent Words

pterygium definitions

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WordNet (r) 3.0 (2005)

n
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

Merriam Webster's

noun (plural pterygia; also -iums) Etymology: New Latin, from Greek pterygion little wing, from pteryx Date: 1657 a fleshy mass of thickened conjunctiva that grows over part of the cornea usually from the inner side of the eyeball and causes a disturbance of vision

Webster's 1913 Dictionary

Pterygium Pte*ryg"i*um, n.; pl. E. Pterygiums, L. Pterygia. [NL., fr. Gr. ?, properly a dim, akin to ? a feather.] (Med.) A superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye.