[ tuh-rij-ee-uh m ]
/ təˈrɪdʒ i əm /

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
Related formspte·ryg·i·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pterygium

Medicine definitions for pterygium


[ tə-rĭjē-əm ]

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.
Related formspte•rygi•al adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.