n. an act or instance of winking or blinking; a wink, a blink
the GNU version of the Collaborative International Dictionary of English
n. The act of winking; nictitation.
The Century Dictionary and Cyclopedia
n. Same as nictitation.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a reflex that closes and opens the eyes rapidly
Word Usage
"The membrane of nictation is an accessory eyelid common to all domestic animals, the purpose of which is to remove foreign substances from the eye in much the same manner as we use the hand."