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pterygium

[tuh-rij-ee-uh m]
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

Examples from the Web for pterygium

Historical Examples of pterygium

  • Pterygium: a lateral expansion of the snout of some Coleoptera.

    Explanation of Terms Used in Entomology

    John. B. Smith

  • Pterygium should be removed when advancing across the cornea, especially when the pupillary area is becoming involved.

  • The base of the pterygium was then severed with the scalpel for the plastic operation on entropion.

  • Albucasis, who conveys entire the passage on pterygium from Paul, gives figures of both these instruments.

  • Tension being made on the thread by an assistant, the operator sawed off the pterygium towards the apex by means of the horsehair.


pterygium in Medicine

pterygium

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