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[sa-kahd, suh-] /sæˈkɑd, sə-/
the act of checking a horse quickly with a single strong pull of the reins.
Ophthalmology. the series of small, jerky movements of the eyes when changing focus from one point to another.
Origin of saccade
1720-30; < French saccade jerk, jolt, orig., movement of a horseman who abruptly pulls the reins, equivalent to Middle French saqu(er) to pull violently (N dialectal variant of Old French sachier, ultimately derivative of sac sack1, hence presumably with sense “withdraw from a sack”) + -ade -ade1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for saccade


/səˈkɑːd; -ˈkeɪd/
the movement of the eye when it makes a sudden change of fixation, as in reading
a sudden check given to a horse
Word Origin
C18: from French: a jerk on the reins of a horse
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for saccade

1705, from French saccade "a jerk," from obsolete saquer "to shake, pull," dialectal variant of Old French sachier, ultimately from Latin saccus "sack" (see sack (n.1)). Related: Saccadic.

Online Etymology Dictionary, © 2010 Douglas Harper
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saccade in Medicine

saccade sac·cade (sā-käd', sə-)
A rapid intermittent eye movement, as that which occurs when the eyes fix on one point after another in the visual field.

sac·cad'ic (-kä'dĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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