pterygium
English
Etymology
From Ancient Greek πτερύγιον (pterúgion), diminutive of πτέρυξ (ptérux, “wing”).
Noun
pterygium (plural pterygiums or pterygia)
- (pathology) An abnormal mass of tissue in the corner of the eye that obstructs vision
- (zoology) A generalized limb of a vertebrate
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