third eyelid


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third eyelid

third eyelid

n
(Zoology) another name for nictitating membrane

nic′titating mem′brane


n.
a thin membrane, present in many animals, that can be drawn across the eyeball for protection.
[1705–15]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.third eyelid - a protective fold of skin in the eyes of reptiles and birds and some mammalsthird eyelid - a protective fold of skin in the eyes of reptiles and birds and some mammals
eye, oculus, optic - the organ of sight
protective fold - a flap of tissue that protects what it covers
haw - the nictitating membrane of a horse
References in periodicals archive ?
Foreign bodies - Something could be in the eye, possibly hiding under the third eyelid and could be a source of chronic irritation.
Dogs have three eyelids, the third eyelid being an extra eyelid that sweeps across the surface of the eye providing protection and spreading the tear film.
In the corner of your eye, next to your tear duct, is what's left of a third eyelid.
During the past 2 years, this cow had several occurrences of tumor-like lesions in the third eyelid and vulva.
Protrusion of nictitating membrane and cherry eye with bilateral prolapse and protrusion of third eyelid was recorded in one mixed breed cow (Mosbath.
The third eyelid is also known as the "nictitating membrane.
caballi in foal having icterus, pyrexia, anemia, dyspnea and echymotic hemorrhages at third eyelid and mucosa of mouth.
Most people don't know the technical name for the dog's third eyelid (that would be "nictitating membrane," in case you're taking notes), much less what it is.
When the gland of the third eyelid pops out of position, it protrudes from behind the eyelid as a reddish mass.
A: In addition to upper and lower eyelids, cats have a third eyelid that is much more developed than it is in humans.