any of the brain waves constituting theta rhythm.
THINK YOU’VE GOT A HANDLE ON THIS US STATE NICKNAME QUIZ?
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Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
Origin of theta wave
First recorded in 1965–70
Words nearby theta wave
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Medical definitions for theta wave
A waveform on an electroencephalogram having a frequency of 4 to 8 hertz, recorded chiefly in the hippocampus of carnivorous mammals when they are alert or aroused.theta rhythm
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.