The Collaborative International Dictionary of English v.0.48:
Nictate \Nic"tate\, v. i. [L. nictare, nictatum, from nicere to beckon.] To wink; to nictitate. [1913 Webster]WordNet (r) 3.0 (2006):
nictate v 1: briefly shut the eyes; "The TV announcer never seems to blink" [syn: blink, wink, nictitate, nictate]