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third eyelid
(redirected from third eyelid protrusion syndrome)

   Also found in: Medical 0.01 sec.
third eyelid

third eyelid
n
(Life Sciences & Allied Applications / Zoology) another name for nictitating membrane
ThesaurusLegend:  Synonyms Related Words Antonyms
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


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