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1. (n.) pterygium
an abnormal triangular mass of thickened conjunctiva extending over the cornea and interfering with vision.
Etymology: (1650–60; < NL < Gk pterýgion little wing or fin =pteryg-, s. of ptéryx wing, fin)
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| Definition of 'pterygium' |
Princeton's WordNet |
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1. (noun) pterygium
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
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| Definition of 'pterygium' |
Webster Dictionary |
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1. (noun) pterygium
a superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye
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| Definition of 'pterygium' |
U.S. National Library of Medicine |
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1. pterygium
An abnormal triangular fold of membrane in the interpalpebral fissure, extending from the conjunctiva to the cornea, being immovably united to the cornea at its apex, firmly attached to the sclera throughout its middle portion, and merged with the conjunctiva at its base. (Dorland, 27th ed)
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Definitions of pterygium 
