Try Our Apps


The Best Internet Slang

nictitating membrane

a thin membrane, or inner or third eyelid, present in many animals, capable of being drawn across the eyeball, as for protection.
Origin of nictitating membrane
1705-15; nictate + -ing2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for nictitating membrane
Historical Examples
British Dictionary definitions for nictitating membrane

nictitating membrane

(in reptiles, birds, and some mammals) a thin fold of skin beneath the eyelid that can be drawn across the eye Also called third eyelid, haw
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
nictitating membrane in Science
nictitating membrane
A transparent inner eyelid in birds, reptiles, amphibians, and some mammals that protects and moistens the eye without blocking vision.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Difficulty index for nictitating membrane

Few English speakers likely know this word

Word Value for nictitating

Scrabble Words With Friends

Nearby words for nictitating membrane