noun, plural pte·ryg·i·ums, pte·ryg·i·a [tuh-rij-ee-uh] /təˈrɪdʒ i ə/. Ophthalmology.
an abnormal triangular mass of thickened conjunctiva extending over the cornea and interfering with vision.
Origin of pterygium
1650–60; < New Latin < Greek pterýgion little wing or fin, equivalent to pteryg- (stem of ptéryx) wing, fin + -ion diminutive suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
zoology of or relating to a fin or wing
Word Origin for pterygial
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
n. pl. pte•ryg•i•ums
An abnormal mass of tissue arising from the conjunctiva of the inner corner of the eye that obstructs vision by growing over the cornea.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.