RhymeZone: saccade definitions

Definitions of saccade:

noun: (rare) A sudden jerking movement.
noun: A rapid jerky movement of the eye (voluntary or involuntary) from one focus to another.
noun: The act of checking a horse quickly with a single strong pull of the reins.
noun: (music) The sounding of two violin strings together by using a sudden strong pressure of the bow.
verb: (of the eye) To make a rapid jerking movement to focus elsewhere.

(Definitions from Wiktionary)