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A rapid, involuntary, oscillatory motion of the eyeball.

[New Latin, from Greek nustagmos, drowsiness.]

nys·tag′mic (-mĭk) adj.
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.


(Medicine) relating to the medical condition known as nystagmus
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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IAnd if you're oldish, and myopic, or long sighted, or nystagmic, you will doubtless empathise with my plight.
He lived without food for 70 days, longer than eight of the 10 men who died, physically suffering nothing more serious than ulcerative colitis (an inflammation of the bowel) and nystagmic (involuntarily twitching) eyes.
The normal nystagmic response of infants to caloric and per-rotary stimulation.