pterygium

noun
pte·​ryg·​i·​um | \ te-ˈri-jē-əm How to pronounce pterygium (audio) \
plural pterygia\ te-​ˈri-​jē-​ə How to pronounce pterygium (audio) \ also pterygiums

Definition of pterygium

: a fleshy mass of thickened conjunctiva that grows over part of the cornea usually from the inner side of the eyeball and causes a disturbance of vision

Examples of pterygium in a Sentence

Recent Examples on the Web And so the Paralympian — who was born with popliteal pterygium syndrome and is a double above-knee amputee — took him up on the offer. Lindsay Kimble, PEOPLE.com, 14 Aug. 2020 Handler explained that a pterygium can extend onto the cornea, affecting vision. Beth Wood, San Diego Union-Tribune, 24 June 2019 Other eye conditions are related to UV exposure, including the noncancerous growths known as pinguecula and pterygium. Jill U. Adams, courant.com, 31 May 2018 Other eye conditions are related to UV exposure, including the noncancerous growths known as pinguecula and pterygium. Jill U. Adams, courant.com, 31 May 2018 Other eye conditions are related to UV exposure, including the noncancerous growths known as pinguecula and pterygium. Jill U. Adams, courant.com, 31 May 2018 Other eye conditions are related to UV exposure, including the noncancerous growths known as pinguecula and pterygium. Jill U. Adams, courant.com, 31 May 2018 Other eye conditions are related to UV exposure, including the noncancerous growths known as pinguecula and pterygium. Jill U. Adams, courant.com, 31 May 2018 Ultraviolet rays may play a role in the development of cataracts as well as growths on the surface of the eye called pterygiums, which can impede your vision. Amanda Gardner, Health.com, 13 June 2018 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pterygium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of pterygium

1562, in the meaning defined above

History and Etymology for pterygium

New Latin, from Greek pterygion little wing, from pteryx

Learn More About pterygium

Time Traveler for pterygium

Time Traveler

The first known use of pterygium was in 1562

See more words from the same year

Dictionary Entries Near pterygium

pterygiophore

pterygium

pterygobranchiate

See More Nearby Entries 

Statistics for pterygium

Cite this Entry

“Pterygium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pterygium. Accessed 27 Jun. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for pterygium

pterygium

noun
pte·​ryg·​i·​um | \ te-ˈrij-ē-əm How to pronounce pterygium (audio) \
plural pterygiums or pterygia\ -​ē-​ə How to pronounce pterygium (audio) \

Medical Definition of pterygium

1 : a triangular fleshy mass of thickened conjunctiva occurring usually at the inner side of the eyeball, covering part of the cornea, and causing a disturbance of vision
2 : a forward growth of the cuticle over the nail

More from Merriam-Webster on pterygium

Britannica.com: Encyclopedia article about pterygium

WORD OF THE DAY

Test Your Vocabulary

Name That Food

  • a-light
  • Name these cookies!
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!