Source : Webster's Revised Unabridged Dictionary (1913)

Nictation \Nic*ta"tion\, n. [L. nictatio ? cf. F. nictation.]
   the act of winking; nictitation.

Source : WordNet®

nictation
     n : a reflex that closes and opens the eyes rapidly [syn: {blink},
          {eye blink}, {blinking}, {wink}, {winking}, {nictitation}]