nictitating membrane

1. 1.

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

   Synonymsthird eyelid

   Broaderprotective fold

   Narrowerhaw

   Part ofeye

Questions about nictitating membrane

What does nictitating membrane mean?

nictitating membrane means "a protective fold of skin in the eyes of reptiles and birds and some mammals".

What is another word for nictitating membrane?

Close synonyms include third eyelid. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is nictitating membrane a common word?

nictitating membrane is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.