nictitating membrane

noun

Definition of nictitating membrane 

: a thin membrane found in many vertebrates at the inner angle or beneath the lower lid of the eye and capable of extending across the eyeball

First Known Use of nictitating membrane

1713, in the meaning defined above

Keep scrolling for more

Learn More about nictitating membrane

Share nictitating membrane

Dictionary Entries near nictitating membrane

nictate

nictitant

nictitate

nictitating membrane

nictitating spasm

NICU

nicuri

Statistics for nictitating membrane

Look-up Popularity

Time Traveler for nictitating membrane

The first known use of nictitating membrane was in 1713

See more words from the same year

Keep scrolling for more

More Definitions for nictitating membrane

nictitating membrane

noun

Medical Definition of nictitating membrane 

: a thin membrane found in many vertebrate animals at the inner angle or beneath the lower lid of the eye and capable of extending across the eyeball

called also membrana nictitans, third eyelid

Comments on nictitating membrane

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

WORD OF THE DAY

exaggeratedly or childishly emotional

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Add Diction

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!