Origin of nystagmus
New Latin, from Greek nystagmos drowsiness, from nystazein to doze; probably akin to Lithuanian snusti to doze
First Known Use: 1776
Medical Definition of nystagmus
: involuntary usually rapid movement of the eyeballs (as from side to side) occurring normally with dizziness during and after bodily rotation or abnormally following head injury or as a symptom of disease
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