pterygium

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pte·ryg·i·um

 (tə-rĭj′ē-əm)
n. pl. pte·ryg·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.

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

pte·ryg′i·al (-əl) adj.

pterygium

(təˈrɪdʒɪəm)
n, pl -gia (-dʒɪə)
1. (Pathology) pathol an abnormal tissue growth over the corner of the eye
2. (Medicine) pathol an abnormal growth of the cuticle over the nail plate
3. (Medicine) pathol a web of skin found on the neck or between digits
4. (Anatomy) anatomy obsolete any of various wing-like structures
5. (Zoology) entomol obsolete (in some lepidopterans) a lobe at the base of the hind wing
6. (Anatomy) anatomy a vertebrate fin
7. botany obsolete a petal in the shape of a wing

pte•ryg•i•um

(təˈrɪdʒ i əm)

n., pl. -ryg•i•ums, -ryg•i•a (-ˈrɪdʒ i ə)
an abnormal triangular mass of thickened conjunctiva extending over the cornea and interfering with vision.
[1650–60; < New Latin < Greek pterýgion little wing or fin =pteryg-, s. of ptéryx wing, fin]
pte•ryg′i•al, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.pterygium - either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the corneapterygium - 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
conjunctiva - a transparent lubricating mucous membrane that covers the eyeball and the under surface of the eyelid
Translations

pte·ryg·i·um

n. pterigión, membrana de tejido subconjuntivo que al extenderse de la conjuntiva hasta la córnea obstruye la visión.

pterygium

n pterigión m, carnosidad f en el ojo
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The sponges are soaked in mitomycin-C, which is a chemotherapy agent that destroys the type of last-growing cells that create pterygiums in an effort to prevent any recurrence.
Prolonged sun exposure has been linked to pterygiums and cataracts, both eye maladies that may require surgery.