nycthemeronn.

Brit.

/nɪkˈθɛm(ə)rɒn/, U.S.

/ˌnɪkˈθɛməˌrɑn/

Forms: 1600s 1800s– nycthemeron, 1700s– nychthemeron.

Origin: A borrowing from Greek. Etymon: Greek νυχθήμερον.

Etymology: < Hellenistic Greek νυχθήμερον period of a day and a night, use as noun of neuter singular of νυχθήμερος lasting for a day and a night < ancient Greek νυκτ- , νύξ night (see nycti- comb. form) + ἡμέρα day (see hemera n.²). Compare earlier nuchthemerinal adj.In Greek the -κτ- of νυκτ- are assimilated to -χθ- before the initial aspiration of ἡμέρα, but in English the former consonant sometimes loses its aspiration, by analogy with other formations in nyct-. N.E.D. (1907) enters this under nychthemeron and gives the pronunciation as (nikþī·mĕrǫn) /nɪkˈθiːmərɒn/.

A period of twenty-four hours, consisting of a day and a night.

ΘΚΠ

the world > time > period > a day or twenty-four hours > [noun]

dayOE

journeyc1305

joura1500

dog day1669

nycthemeron1682

lunar day1686

political day1706

twenty-four1735

nycthemer1837

mail-day1844

Tag1914

1682 H. More Annot. Lux Orientalis 115 in Two Choice & Useful Treat. Onely the shadowy Vale of the Night will be cast over them once in a Nycthemeron.

1728 E. Chambers Cycl. at Gout About two or three a-Clock in the Morning (the Space of a Nychthemeron from its Access).

a1859 T. De Quincey Writings 124 He, finding the English word day employed in the measurement of the intervals, takes it for granted that this must mean a nychthemeron of twenty-four hours.

1882 E. J. C. Morton Heroes Sci.: Astronomers 51 Tables of the prosthapheresis and nychthemeron are given.

1882 Nature 25 May 79/2 The year was regarded by them as an extended nycthemeron.

1908 Hibbert Jrnl. 7 93 The dawn and gloaming most invite one to Musement; but I have found no watch of the nychthemeron that has not its own advantages for the pursuit.

1977 Jrnl. Asian Stud. 37 40 It is homologous with the midnight of the solar day.., the winter solstice of the earth's year, the midnight of the nycthemeron of the fathers.

1979 Paleobiology 5 286/2 Endotherms do not necessarily maintain high body temperatures throughout a 24 hr period (nychthemeron).

2006 C. M. Sinton & J. T. Willie in D. P. Cardinali & S. R. Pandi-Perumal Neuroendocrine Correlates Sleep/Wakefulness 231 The absence of the neuropeptide has a net effect on the distribution of REM sleep across the nycthemeron.

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).

单词	nycthemeron
释义	nycthemeronn. Brit. /nɪkˈθɛm(ə)rɒn/, U.S. /ˌnɪkˈθɛməˌrɑn/ Forms: 1600s 1800s– nycthemeron, 1700s– nychthemeron. Origin: A borrowing from Greek. Etymon: Greek νυχθήμερον. Etymology: < Hellenistic Greek νυχθήμερον period of a day and a night, use as noun of neuter singular of νυχθήμερος lasting for a day and a night < ancient Greek νυκτ- , νύξ night (see nycti- comb. form) + ἡμέρα day (see hemera n.²). Compare earlier nuchthemerinal adj.In Greek the -κτ- of νυκτ- are assimilated to -χθ- before the initial aspiration of ἡμέρα, but in English the former consonant sometimes loses its aspiration, by analogy with other formations in nyct-. N.E.D. (1907) enters this under nychthemeron and gives the pronunciation as (nikþī·mĕrǫn) /nɪkˈθiːmərɒn/. A period of twenty-four hours, consisting of a day and a night. ΘΚΠ the world > time > period > a day or twenty-four hours > [noun] dayOE journeyc1305 joura1500 dog day1669 nycthemeron1682 lunar day1686 political day1706 twenty-four1735 nycthemer1837 mail-day1844 Tag1914 1682 H. More Annot. Lux Orientalis 115 in Two Choice & Useful Treat. Onely the shadowy Vale of the Night will be cast over them once in a Nycthemeron. 1728 E. Chambers Cycl. at Gout About two or three a-Clock in the Morning (the Space of a Nychthemeron from its Access). a1859 T. De Quincey Writings 124 He, finding the English word day employed in the measurement of the intervals, takes it for granted that this must mean a nychthemeron of twenty-four hours. 1882 E. J. C. Morton Heroes Sci.: Astronomers 51 Tables of the prosthapheresis and nychthemeron are given. 1882 Nature 25 May 79/2 The year was regarded by them as an extended nycthemeron. 1908 Hibbert Jrnl. 7 93 The dawn and gloaming most invite one to Musement; but I have found no watch of the nychthemeron that has not its own advantages for the pursuit. 1977 Jrnl. Asian Stud. 37 40 It is homologous with the midnight of the solar day.., the winter solstice of the earth's year, the midnight of the nycthemeron of the fathers. 1979 Paleobiology 5 286/2 Endotherms do not necessarily maintain high body temperatures throughout a 24 hr period (nychthemeron). 2006 C. M. Sinton & J. T. Willie in D. P. Cardinali & S. R. Pandi-Perumal Neuroendocrine Correlates Sleep/Wakefulness 231 The absence of the neuropeptide has a net effect on the distribution of REM sleep across the nycthemeron. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < n.1682
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