American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

nictitation, nictation

the process of winking or blinking rapidly, as in certain birds or animals or as the result of a tic in humans.

See also: Eyes

-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.