n.
A rapid, involuntary, oscillatory motion of the eyeball.
[New Latin, from Greek nustagmos, drowsiness.]
nystagmic nys·tag'mic (-mĭk) adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
