- 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. 2018
- zoology of or relating to a fin or wing
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
- 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.