pterygium

noun pte·ryg·i·um \ te-ˈri-jē-əm \
Updated on: 28 May 2018

Definition of pterygium

plural pterygia play \te-ˈri-jē-ə\ also pterygiums
: 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

Recent Examples of pterygium from the Web

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.

Origin and Etymology of pterygium

New Latin, from Greek pterygion little wing, from pteryx


Medical Dictionary

pterygium

noun pte·ryg·i·um \ te-ˈrij-ē-əm \

medical Definition of pterygium

plural -iums or -ia play \-ē-ə\
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

Learn More about pterygium


Seen and Heard

What made you want to look up pterygium? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

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

WORD OF THE DAY

immune from criticism or violation

Get Word of the Day daily email!

Test Your Vocabulary

May 2018 Words of the Day Quiz

  • spring-flowers
  • Which is a synonym of raillery?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

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!