an inner eyelid
Found on
http://australianmuseum.net.au/Glossary-of-fish-terms
The nictitating membrane (from Latin nictare, to blink) is a transparent or translucent third eyelid present in some animals that can be drawn across the eye for protection and to moisten it while maintaining visibility. Some reptiles, birds, and sharks have full nictitating membranes; in many mammals, a small, vestigial portion of the membrane re...
Found on
http://en.wikipedia.org/wiki/Nictitating_membrane
A thin membrane that can be drawn across the eyeball to protect and clean it. Found on many fish species, including some sharks.
Found on
http://english-fly-fishing-flies.s3-website-eu-west-1.amazonaws.com/glossar
Transparent third eyelid
Found on
http://www.cat-world.com.au/glossary
a moveable lower eyelid.
Found on
http://www.encyclo.co.uk/local/20126
A transparent fold of skin lying deep to the other eyelids at the mesial side, which may be drawn over the front of the eyeball. It is the so-called third eyelid, found in reptiles and birds generally and in many mammals. ... (12 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973
An inner, third eyelid present in many land animals. Some can slide this across the eye (from the inner corner) to clean or protect the eyeball.
Found on
http://www.encyclo.co.uk/local/22217
also known as
Found on
http://www.encyclo.co.uk/local/22220
Type: Term Synonyms: plica semilunaris of conjunctiva2
Found on
http://www.medilexicon.com/medicaldictionary.php?t=53958
"third eyelid" drawn over the eye to clean it
Found on
http://www.pugetsound.edu/academics/academic-resources/slater-museum/biodiv
an inner eyelid
Found on
http://www.translationdirectory.com/glossaries/glossary302.php
[
n] - a protective fold of skin in the eyes of reptiles and birds and some mammals
Found on
http://www.webdictionary.co.uk/definition.php?query=nictitating%20membrane
A thin, translucent fold of skin that sweeps sideways across the eye from front to back, moistening and cleaning the eye and protecting its surface. Found in many vertebrates, including birds, but not in humans.
Found on
https://academy.allaboutbirds.org/bird-academys-a-to-z-glossary-of-bird-ter
Transparent fold of skin forming a third eyelid
Found on
https://birds.iitk.ac.in/glossary?page=139
a transparent third eyelid hinged at the lower lid of the eye of raptors, and closes laterally across the eye
Found on
https://sciencetrek.org/sciencetrek/topics/birds_of_prey/glossary.cfm
A membrane that cleans and protects a hawk's eye.
Found on
https://sites.google.com/site/breckfalconry/glossary
third eyelid noun a protective fold of skin in the eyes of reptiles and birds and some mammals
Found on
https://www.encyclo.co.uk/local/20974
A transparent inner eyelid in birds, reptiles, and some mammals that closes to protect and moisten the eye. Also called third eyelid.
Found on
https://www.encyclo.co.uk/local/21273
The third eyelid of the bird that can be closed for protection. It has its own moisturizing system similar to tear ducts.
Found on
https://www.encyclo.co.uk/local/22222
a thin membrane, or inner or third eyelid, present in many animals, capable of being drawn across the eyeball, as for protection.
Found on
https://www.infoplease.com/dictionary/nictitating-membrane
No exact match found.
