noun Medicine/Medical.

  1. an instrument for measuring and recording the electric activity of the brain.


  1. an instrument for recording the electrical activity of the brain, usually by means of electrodes placed on the scalp: used to diagnose tumours of the brain, to study brain waves, etcAbbreviation: EEG See also brain wave


  1. An instrument that generates a record of the electrical activity of the brain by measuring electric potentials using electrodes attached to the scalp.

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