nictation

n.

[L. nictatio; cf. F. nictation.]
The act of winking; nictitation.

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noun

A brief closing of the eyes: blink, nictitation, wink. See see/not see.

IN BRIEF: n. - A reflex that closes and opens the eyes rapidly.

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The noun has one meaning:

Meaning #1: a reflex that closes and opens the eyes rapidly
  Synonyms: blink, eye blink, blinking, wink, winking, nictitation

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