Saccade

from WordNet (r) 3.0 (2006)

saccade
    n 1: a rapid, jerky movement of the eyes between positions of
         rest
    2: an abrupt spasmodic movement [syn: {jerk}, {jerking}, {jolt},
       {saccade}]

from The Collaborative International Dictionary of English v.0.48

Saccade \Sac*cade"\, n. [F.] (Man.)
   A sudden, violent check of a horse by drawing or twitching
   the reins on a sudden and with one pull.
   [1913 Webster]

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