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automatograph

[aw-tuh-mat-uh-graf, -grahf]
noun
  1. a device for recording involuntary bodily movements.
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Origin of automatograph

1890–95; < Greek autómato(s) self-moving (see automaton) + -graph
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018