Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A type of electrical activity in the brain; brain waves with a frequency of 4-8 hertz.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the normal brainwave in the encephalogram of a person who is awake but relaxed and drowsy; occurs with low frequency and low amplitude

Etymologies

theta + wave (Wiktionary)

Examples

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