delta wave

delta wave
noun
the normal brainwave in the encephalogram of a person in deep dreamless sleep; occurs with high voltage and low frequency (1 to 4 hertz)
Syn: ↑delta rhythm
Hypernyms: ↑brainwave, ↑brain wave, ↑cortical potential

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noun also delta or delta rhythm
: a high amplitude electrical rhythm of the brain with a frequency of less than 6 cycles per second that occurs especially in deep sleep, in infancy, and in many diseased conditions of the brain

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Physiol.
any of the slow brain waves constituting delta rhythm.
[1935-40]

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delta rhythm or delta wave noun
One of the waves recorded on an electroencephalogram indicating the low-frequency brain activity of a sleeping person
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Main Entry:delta

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delta wave,
a large, slow brain wave marking the deepest level of sleep: »

High-amplitude delta waves in sleep are almost typical of youth. With increasing age, however, the EEG [electroencephalogram] of the delta waves becomes smaller and flatter (Segal and Luce).


Useful english dictionary. 2012.

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  • delta wave — noun Date: 1936 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… …   New Collegiate Dictionary

  • delta wave — {n.}, {informal}, {semi technical} A brain wave 1 3 cycles per second, associated with very deep sleep. * /Good night, honey, I m off to produce some delta waves./ Compare: CATCH SOME Z S, HIT THE HAY or HIT THE SACK …   Dictionary of American idioms

  • delta wave — {n.}, {informal}, {semi technical} A brain wave 1 3 cycles per second, associated with very deep sleep. * /Good night, honey, I m off to produce some delta waves./ Compare: CATCH SOME Z S, HIT THE HAY or HIT THE SACK …   Dictionary of American idioms

  • delta\ wave — noun informal semi technical A brain wave 1 3 cycles per second, associated with very deep sleep. Good night, honey, I m off to produce some delta waves. Compare: catch some Z s, hit the hay or hit the sack …   Словарь американских идиом

  • delta wave — del′ta wave n. phl any of the slow brain waves constituting delta rhythm • Etymology: 1935–40 …   From formal English to slang

  • delta wave — Physiol. any of the slow brain waves constituting delta rhythm. [1935 40] * * * …   Universalium

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