delta wave

noun

Definition of delta wave 

: a high amplitude electrical rhythm of the brain with a frequency of less than four cycles per second that occurs especially in slow-wave sleep, in infancy, and in many diseased conditions of the brain

called also delta, delta rhythm

First Known Use of delta wave

1936, in the meaning defined above

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The first known use of delta wave was in 1936

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delta wave

noun

Medical Definition of delta wave 

: a high amplitude electrical rhythm of the brain with a frequency of less than 6 hertz that occurs especially in deep sleep, in infancy, and in many diseased conditions of the brain

called also delta, delta rhythm

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