THIRD EYELID

Pronunciation (US): (GB):

Meaning:

A protective fold of skin in the eyes of reptiles and birds and some mammals

Synonyms:

nictitating membrane; third eyelid

Classified under:

Nouns denoting body parts

Hypernyms ("third eyelid" is a kind of...):

protective fold (a flap of tissue that protects what it covers)

Hyponyms (each of the following is a kind of "third eyelid"):

haw (the nictitating membrane of a horse)

Holonyms ("third eyelid" is a part of...):

eye; oculus; optic (the organ of sight)