remn.¹

Brit.

/rɛm/, U.S.

/rɛm/

Inflections: Plural unchanged, rems.

Origin: Formed within English, as an acronym. Etymon: English roentgen equivalent man.

Etymology: Acronym < the initial letters of roentgen equivalent man < Roentgen n. + equivalent adj. + man n.¹ (compare quot. 1947²).

Physics.

Originally: a quantity of ionizing radiation having the same effect on human tissue as one roentgen of X-rays. Later: the dosage in rads multiplied by the relative biological effectiveness of the radiation. Cf. rep n.⁹The corresponding SI unit is the sievert (Sievert n.). One rem is 10 millisieverts.

ΘΚΠ

the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [noun] > units of radioactivity > as dosage

Sievert unit1945

rem1947

rep1947

Sievert1977

1947 Nucleonics Oct. 38/2 The rep and rem units were introduced by Dr. H. M. Parker.

1947 Nucleonics Oct. 39/2 Roentgen-equivalent-man (or mammal), rem... One rem is the estimated amount of energy absorbed in tissue which is biologically equivalent in man to 1 r of gamma- or X-rays.

1958 Observer 5 Oct. 15/4 The most active watches..could deliver a dose of five rem (units of radioactive dose measurement) within five years.

1975 Nature 27 Mar. 278/2 Fifteen rem is equivalent to 1·5 rad of alpha radiation (since alpha radiation is considered 10 times as carcinogenic as gamma radiation).

1982 M. Kaku & J. T. Thompson Nucl. Power (1983) ii. 28 Chest x-rays expose people to approximately 0.01 rems.

2008 J. E. Girard Criminalistics xvi. 436/1 An exposure of 600 rem will be fatal to most humans.

This entry has been updated (OED Third Edition, December 2009; most recently modified version published online March 2022).

REMn.²

Brit.

/rɛm/,

/ˌɑːriːˈɛm/, U.S.

/rɛm/,

/ˌɑrˌiˈɛm/

Forms: 1900s– REM, 1900s– (rare) rem.

Origin: Formed within English, as an initialism. Etymon: rapid eye movement n. at rapid adj., adv., and n. Compounds 1.

Etymology: Originally an initialism < the initial letters of rapid eye movement (see rapid eye movement n. at rapid adj., adv., and n. Compounds 1); now usually reinterpreted as an acronym.

= rapid eye movement n. at rapid adj., adv., and n. Compounds 1; frequently attributive, esp. in REM sleep. Also: the deep phase of sleep when such eye movements occur.

ΘΚΠ

the world > physical sensation > sleeping and waking > sleep > [noun] > other specific types

subetha1398

rapid eye movement1900

dream sleep1902

REM1957

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

REM1957

paradoxical1962

1957 W. Dement & N. Kleitman in Jrnl. Exper. Psychol. 53 340/1 In most of the remaining text the following abbreviations will be used: REM's (rapid eye movements) and NREM's (no rapid eye movements).

1963 Science 6 Dec. 1314/3 Recent evidence suggests that brain stem centers mediate the specific pattern of REM sleep changes.

1977 S. Dunkell Sleep Positions ii. 38 As we continue our journey through the night, the duration of each successive REM phase increases.

1989 A. Beattie Picturing Will i. vii. 70 His eyes darted left and right, behind closed eyelids... Now Mel's REMs had subsided.

2003 B. Wagner Still Holding ii. 154 Sometimes he surfaces from REM sleep cackling, knee-slapping, with attendant nefarious dysphonic outbursts.

2004 Nature 1 July 21/2 Three aminergic neuronal systems—the noradrenergic, the serotonergic and the histaminergic—all shut down in REM.

2009 Daily Tel. 9 June 14 Young adults who entered REM during sleep improved their ability to solve new tasks.

This entry has been updated (OED Third Edition, December 2009; most recently modified version published online March 2022).

† remadj.

Origin: Formed within English, by clipping or shortening. Etymon: remanded adj. at remand v. Derivatives.

Etymology: Shortened < remanded adj. at remand v. Derivatives.

slang. Obsolete. rare.

Remanded.

ΚΠ

1887 J. W. Horsley Jottings from Jail i. 23 ‘Rem for a bust’.. means..remanded for a burglary.

This entry has been updated (OED Third Edition, December 2009; most recently modified version published online September 2020).

n.¹1947

n.²1957

adj.1887

单词	rem
释义	remn.¹ Brit. /rɛm/, U.S. /rɛm/ Inflections: Plural unchanged, rems. Origin: Formed within English, as an acronym. Etymon: English roentgen equivalent man. Etymology: Acronym < the initial letters of roentgen equivalent man < Roentgen n. + equivalent adj. + man n.¹ (compare quot. 1947²). Physics. Originally: a quantity of ionizing radiation having the same effect on human tissue as one roentgen of X-rays. Later: the dosage in rads multiplied by the relative biological effectiveness of the radiation. Cf. rep n.⁹The corresponding SI unit is the sievert (Sievert n.). One rem is 10 millisieverts. ΘΚΠ the world > matter > physics > atomic nucleus > measurement of ionizing radiation > [noun] > units of radioactivity > as dosage Sievert unit1945 rem1947 rep1947 Sievert1977 1947 Nucleonics Oct. 38/2 The rep and rem units were introduced by Dr. H. M. Parker. 1947 Nucleonics Oct. 39/2 Roentgen-equivalent-man (or mammal), rem... One rem is the estimated amount of energy absorbed in tissue which is biologically equivalent in man to 1 r of gamma- or X-rays. 1958 Observer 5 Oct. 15/4 The most active watches..could deliver a dose of five rem (units of radioactive dose measurement) within five years. 1975 Nature 27 Mar. 278/2 Fifteen rem is equivalent to 1·5 rad of alpha radiation (since alpha radiation is considered 10 times as carcinogenic as gamma radiation). 1982 M. Kaku & J. T. Thompson Nucl. Power (1983) ii. 28 Chest x-rays expose people to approximately 0.01 rems. 2008 J. E. Girard Criminalistics xvi. 436/1 An exposure of 600 rem will be fatal to most humans. This entry has been updated (OED Third Edition, December 2009; most recently modified version published online March 2022). REMn.² Brit. /rɛm/, /ˌɑːriːˈɛm/, U.S. /rɛm/, /ˌɑrˌiˈɛm/ Forms: 1900s– REM, 1900s– (rare) rem. Origin: Formed within English, as an initialism. Etymon: rapid eye movement n. at rapid adj., adv., and n. Compounds 1. Etymology: Originally an initialism < the initial letters of rapid eye movement (see rapid eye movement n. at rapid adj., adv., and n. Compounds 1); now usually reinterpreted as an acronym. = rapid eye movement n. at rapid adj., adv., and n. Compounds 1; frequently attributive, esp. in REM sleep. Also: the deep phase of sleep when such eye movements occur. ΘΚΠ the world > physical sensation > sleeping and waking > sleep > [noun] > other specific types subetha1398 rapid eye movement1900 dream sleep1902 REM1957 the world > physical sensation > sleeping and waking > sleep > [adjective] > type of sleep > characterized by dreaming or REM REM1957 paradoxical1962 1957 W. Dement & N. Kleitman in Jrnl. Exper. Psychol. 53 340/1 In most of the remaining text the following abbreviations will be used: REM's (rapid eye movements) and NREM's (no rapid eye movements). 1963 Science 6 Dec. 1314/3 Recent evidence suggests that brain stem centers mediate the specific pattern of REM sleep changes. 1977 S. Dunkell Sleep Positions ii. 38 As we continue our journey through the night, the duration of each successive REM phase increases. 1989 A. Beattie Picturing Will i. vii. 70 His eyes darted left and right, behind closed eyelids... Now Mel's REMs had subsided. 2003 B. Wagner Still Holding ii. 154 Sometimes he surfaces from REM sleep cackling, knee-slapping, with attendant nefarious dysphonic outbursts. 2004 Nature 1 July 21/2 Three aminergic neuronal systems—the noradrenergic, the serotonergic and the histaminergic—all shut down in REM. 2009 Daily Tel. 9 June 14 Young adults who entered REM during sleep improved their ability to solve new tasks. This entry has been updated (OED Third Edition, December 2009; most recently modified version published online March 2022). † remadj. Origin: Formed within English, by clipping or shortening. Etymon: remanded adj. at remand v. Derivatives. Etymology: Shortened < remanded adj. at remand v. Derivatives. slang. Obsolete. rare. Remanded. ΚΠ 1887 J. W. Horsley Jottings from Jail i. 23 ‘Rem for a bust’.. means..remanded for a burglary. This entry has been updated (OED Third Edition, December 2009; most recently modified version published online September 2020). < n.¹1947n.²1957adj.1887
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remn.1

REMn.2

† remadj.

remn.¹

REMn.²