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pterygium

[tuh-rij-ee-uh m]
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noun, plural pte·ryg·i·ums, pte·ryg·i·a [tuh-rij-ee-uh] /təˈrɪdʒ i ə/. Ophthalmology.
  1. an abnormal triangular mass of thickened conjunctiva extending over the cornea and interfering with vision.
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Origin of pterygium

1650–60; < New Latin < Greek pterýgion little wing or fin, equivalent to pteryg- (stem of ptéryx) wing, fin + -ion diminutive suffix
Related formspte·ryg·i·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for pterygial

pterygial

adjective
  1. zoology of or relating to a fin or wing
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Word Origin

from Greek pterux wing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
pterygial in Medicine

pterygium

(tə-rĭj′ē-əm)
n. pl. pte•ryg•i•ums
  1. An abnormal mass of tissue arising from the conjunctiva of the inner corner of the eye that obstructs vision by growing over the cornea.
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Related formspte•ryg′i•al adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.