The Collaborative International Dictionary of English v.0.48:
Nictitation \Nic`ti*ta"tion\, n. The act of winking. [1913 Webster]WordNet (r) 3.0 (2006):
nictitation n 1: a reflex that closes and opens the eyes rapidly [syn: blink, eye blink, blinking, wink, winking, nictitation, nictation]