Search Result for "nictitating_membrane":
Wordnet 3.0

NOUN (1)

1. a protective fold of skin in the eyes of reptiles and birds and some mammals;
[syn: nictitating membrane, third eyelid]


The Collaborative International Dictionary of English v.0.48:

Nictitate \Nic"ti*tate\, v. i. [See Nictate.] To wink; to nictate. [1913 Webster] Nictitating membrane (Anat.), a thin membrane, found in many animals at the inner angle, or beneath the lower lid, of the eye, and capable of being drawn across the eyeball; the third eyelid; the haw. [1913 Webster]
WordNet (r) 3.0 (2006):

nictitating membrane n 1: a protective fold of skin in the eyes of reptiles and birds and some mammals [syn: nictitating membrane, third eyelid]