slow waven.

Brit.

/ˈsləʊ weɪv/, U.S.

/ˈsloʊ ˌweɪv/

Origin: Formed within English, by compounding. Etymons: slow adj., wave n.

Etymology: < slow adj. + wave n.

In various contexts: a mechanical, electromagnetic, or electrophysiological wave of comparatively low frequency and long wavelength.

ΘΚΠ

the world > physical sensation > sleeping and waking > sleep > [adjective] > type of sleep > characterized by dreaming or REM > absence of

slow wave1869

orthodox1967

1869 Eng. Mechanic 21 May 204/3 When a spectrum is examined, far before any colour is visible, are found the slow waves which produce heat, then come the red rays, and the more and more rapid ones up to violet, at which they again cease to affect our nerves of sight.

1936 W. G. Walter in Lancet 8 Aug. 308/1 It is suggested that..these slow waves from the neighbourhood of tumours be called ‘δ waves’ until their true nature be discovered.

1948 Proc. Symp. Large-scale Digital Calculating Machinery 1947 110 Devices proposed for producing slow waves fall into different categories: (1) wave-guides with a convenient structure; (2) spiral delay lines; (3) lumped artificial lines.

1989 Jrnl. Physiol. 416 49 The results suggest that gastric slow waves pace the myenteric portion of the circular muscle.

2005 R. E. Newnham Properties of Materials xxvii. 300 Slow waves—both optic and acoustic—enhance the interaction time and the diffracted intensities.

Compounds

C1. General use as a modifier.

ΚΠ

1921 E. P. Cumberbatch Essent. Med. Electr. (ed. 5) i. 29 A slow-wave alternating current, though not sinusoidal in nature, can be obtained by using a device known as ‘Ewing's Rhythmic Reverser’.

1938 Proc. Soc. Exper. Biol. & Med. 38 898 There is a progressive increase in slow wave activity during the preconvulsive stage.

1963 G. Troup Masers & Lasers (ed. 2) iv. 71 There are three kinds of structures suitable for slow-wave propagation in the paramagnetic maser.

2005 IEEE Trans. Electron Devices 52 695/1 As the electromagnetic wave travels through the tube it is propagating along a slow-wave circuit that brings it into synchronism with the electron beam.

2011 J. E. Hall Guyton & Hall Physiol. Rev. (ed. 2) ii. 20 Intestinal smooth muscle..exhibits a rhythmical slow-wave potential that transiently depolarizes and repolarizes the muscle membrane.

C2.

slow wave sleep n. a form of deep sleep, without rapid eye movement, in which low-frequency delta waves predominate in the electroencephalogram.

ΚΠ

1967 Physiol. Rev. 47 118 Synonyms for sleep characterized by slow cortical activity in adult animals:..slow wave sleep (SWS); slow sleep, synchronized sleep.

1968 Brit. Med. Bull. 24 257/1 There is a reduction in the amplitude of the evoked response during rapid eye-movement sleep as compared with slow-wave sleep.

1974 W. P. Koella in H. M. van Praag & H. Meinardi Brain & Sleep 9 Stages 1 to 4 are referred to as NREM-sleep; the term ‘slow-wave-sleep’ should be reserved for stages 3 and 4 which are characterized by the ‘slow’ delta-waves.

2019 @SteveStuWill 12 July in twitter.com (accessed 5 June 2020) Like us, zebrafish have two main types of sleep: REM sleep and slow-wave sleep.

This entry has been updated (OED Third Edition, June 2021; most recently modified version published online March 2022).

单词	slow wave
释义	slow waven. Brit. /ˈsləʊ weɪv/, U.S. /ˈsloʊ ˌweɪv/ Origin: Formed within English, by compounding. Etymons: slow adj., wave n. Etymology: < slow adj. + wave n. In various contexts: a mechanical, electromagnetic, or electrophysiological wave of comparatively low frequency and long wavelength. ΘΚΠ the world > physical sensation > sleeping and waking > sleep > [adjective] > type of sleep > characterized by dreaming or REM > absence of slow wave1869 orthodox1967 1869 Eng. Mechanic 21 May 204/3 When a spectrum is examined, far before any colour is visible, are found the slow waves which produce heat, then come the red rays, and the more and more rapid ones up to violet, at which they again cease to affect our nerves of sight. 1936 W. G. Walter in Lancet 8 Aug. 308/1 It is suggested that..these slow waves from the neighbourhood of tumours be called ‘δ waves’ until their true nature be discovered. 1948 Proc. Symp. Large-scale Digital Calculating Machinery 1947 110 Devices proposed for producing slow waves fall into different categories: (1) wave-guides with a convenient structure; (2) spiral delay lines; (3) lumped artificial lines. 1989 Jrnl. Physiol. 416 49 The results suggest that gastric slow waves pace the myenteric portion of the circular muscle. 2005 R. E. Newnham Properties of Materials xxvii. 300 Slow waves—both optic and acoustic—enhance the interaction time and the diffracted intensities. Compounds C1. General use as a modifier. ΚΠ 1921 E. P. Cumberbatch Essent. Med. Electr. (ed. 5) i. 29 A slow-wave alternating current, though not sinusoidal in nature, can be obtained by using a device known as ‘Ewing's Rhythmic Reverser’. 1938 Proc. Soc. Exper. Biol. & Med. 38 898 There is a progressive increase in slow wave activity during the preconvulsive stage. 1963 G. Troup Masers & Lasers (ed. 2) iv. 71 There are three kinds of structures suitable for slow-wave propagation in the paramagnetic maser. 2005 IEEE Trans. Electron Devices 52 695/1 As the electromagnetic wave travels through the tube it is propagating along a slow-wave circuit that brings it into synchronism with the electron beam. 2011 J. E. Hall Guyton & Hall Physiol. Rev. (ed. 2) ii. 20 Intestinal smooth muscle..exhibits a rhythmical slow-wave potential that transiently depolarizes and repolarizes the muscle membrane. C2. slow wave sleep n. a form of deep sleep, without rapid eye movement, in which low-frequency delta waves predominate in the electroencephalogram. ΚΠ 1967 Physiol. Rev. 47 118 Synonyms for sleep characterized by slow cortical activity in adult animals:..slow wave sleep (SWS); slow sleep, synchronized sleep. 1968 Brit. Med. Bull. 24 257/1 There is a reduction in the amplitude of the evoked response during rapid eye-movement sleep as compared with slow-wave sleep. 1974 W. P. Koella in H. M. van Praag & H. Meinardi Brain & Sleep 9 Stages 1 to 4 are referred to as NREM-sleep; the term ‘slow-wave-sleep’ should be reserved for stages 3 and 4 which are characterized by the ‘slow’ delta-waves. 2019 @SteveStuWill 12 July in twitter.com (accessed 5 June 2020) Like us, zebrafish have two main types of sleep: REM sleep and slow-wave sleep. This entry has been updated (OED Third Edition, June 2021; most recently modified version published online March 2022). < n.1869
随便看	coffee coat coffee cooler coffee cream coffee culture coffee disease coffee essence coffee grinder coffee jacket coffee lightener coffee machine coffee maker coffee morning coffee morocco coffee palace coffee parlour coffee rot coffee royal coffee shop coffee spoon coffee stall coffee sugar coffee table coffee table book coffee things coffee tray