'Nystagmus' definitions:
Definition of 'nystagmus'
(from WordNet)
noun
Involuntary movements of the eyeballs; its presence or absence is used to diagnose a variety of neurological and visual disorders
Definition of 'Nystagmus'
From: GCIDE
- Nystagmus \Nys*tag"mus\, n. [NL., fr. Gr. ? drowsiness, fr. ? to nod in sleep, to slumber.] (Med.) A rapid involuntary oscillation of the eyeballs. [1913 Webster]