noctilucentadj.

Brit.

/ˌnɒktᵻˈluːsnt/, U.S.

/ˌnɑktəˈlus(ə)nt/

Forms: 1600s noctelucent, 1800s– noctilucent.

Origin: Probably of multiple origins. Probably partly formed within English, by derivation. Probably partly formed within English, by compounding. Etymons: noctiluca n., -ent suffix; nocti- comb. form, lucent adj.

Etymology: Probably partly < noctiluca n. + -ent suffix, and partly < nocti- comb. form + lucent adj. Compare slightly earlier noctilucous adj.

1. Luminescent at night or in the dark; (also) shining at night or in the dark. rare.

ΘΚΠ

the world > matter > light > light emitted under particular conditions > [adjective] > phosphorescent

night-shining1598

noctilucous1680

noctilucal1682

noctilucent1691

phosphorous1717

self-luminous1751

phosphorescent1767

phosphoric1771

phosphoreous1776

phosphor1790

phosphorescing1794

phosphoretic1794

phosphorent1819

1691 Athenian Gaz. 4 No. 23. Qu. 12 I presume you have heard of (if not seen) that Noctelucent Insect call'd..the Glow-worm.

1884 Overland Monthly July 22/2 Beowulf's eyes are like a cat's, they are noctilucent: they see and shine by night.

1890 Cent. Dict. Noctilucent, shining by night or in the dark; noctilucid; as, the noctilucent eyes of a cat.

1940 Chambers's Techn. Dict. 581/1 Noctilucent (Zool.), phosphorescent, light-producing.

2. Meteorology. Designating a cloud that appears luminescent at night; spec. designating a silvery or bluish-white cloud occasionally seen at night in summer in high latitudes, forming at the mesopause at a height of about 50 miles (80 kilometres). Cf. nacreous cloud n.The composition of noctilucent clouds is unresolved; they appear to consist of meteoric or cosmic dust particles, ice particles, or a combination of these.

ΘΚΠ

the world > the earth > weather and the atmosphere > weather > cloud > [adjective] > other specific shapes or formations

wavy1796

comoid1818

volumy1827

stratiform1843

pocky1862

noctilucent1910

1910 W. L. Moore Descr. Meteorol. xi. 198 Certain clouds that are seen about midnight in summer have for twenty years received considerable attention from Abbe and others..; sometimes they are called nacreous..at other times noctilucent, because they shine at night.

1936 W. N. Shaw Man. Metereol. (ed. 2) ii. iii. 44 The lower type, known as Perlmutter or iridescent clouds, show brilliant prismatic colours... They differ from noctilucent clouds by appearing almost exclusively in winter.

1963 New Scientist 25 July 169/2 There has been considerable dispute in the past about whether the noctilucent clouds are composed of ice particles or dust particles.

1995 Times 30 May 18/8 Another phenomenon to watch for during June and July evenings is that of noctilucent clouds which form at a height of about 80 km in high latitudes.

This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).

单词	noctilucent
释义	noctilucentadj. Brit. /ˌnɒktᵻˈluːsnt/, U.S. /ˌnɑktəˈlus(ə)nt/ Forms: 1600s noctelucent, 1800s– noctilucent. Origin: Probably of multiple origins. Probably partly formed within English, by derivation. Probably partly formed within English, by compounding. Etymons: noctiluca n., -ent suffix; nocti- comb. form, lucent adj. Etymology: Probably partly < noctiluca n. + -ent suffix, and partly < nocti- comb. form + lucent adj. Compare slightly earlier noctilucous adj. 1. Luminescent at night or in the dark; (also) shining at night or in the dark. rare. ΘΚΠ the world > matter > light > light emitted under particular conditions > [adjective] > phosphorescent night-shining1598 noctilucous1680 noctilucal1682 noctilucent1691 phosphorous1717 self-luminous1751 phosphorescent1767 phosphoric1771 phosphoreous1776 phosphor1790 phosphorescing1794 phosphoretic1794 phosphorent1819 1691 Athenian Gaz. 4 No. 23. Qu. 12 I presume you have heard of (if not seen) that Noctelucent Insect call'd..the Glow-worm. 1884 Overland Monthly July 22/2 Beowulf's eyes are like a cat's, they are noctilucent: they see and shine by night. 1890 Cent. Dict. Noctilucent, shining by night or in the dark; noctilucid; as, the noctilucent eyes of a cat. 1940 Chambers's Techn. Dict. 581/1 Noctilucent (Zool.), phosphorescent, light-producing. 2. Meteorology. Designating a cloud that appears luminescent at night; spec. designating a silvery or bluish-white cloud occasionally seen at night in summer in high latitudes, forming at the mesopause at a height of about 50 miles (80 kilometres). Cf. nacreous cloud n.The composition of noctilucent clouds is unresolved; they appear to consist of meteoric or cosmic dust particles, ice particles, or a combination of these. ΘΚΠ the world > the earth > weather and the atmosphere > weather > cloud > [adjective] > other specific shapes or formations wavy1796 comoid1818 volumy1827 stratiform1843 pocky1862 noctilucent1910 1910 W. L. Moore Descr. Meteorol. xi. 198 Certain clouds that are seen about midnight in summer have for twenty years received considerable attention from Abbe and others..; sometimes they are called nacreous..at other times noctilucent, because they shine at night. 1936 W. N. Shaw Man. Metereol. (ed. 2) ii. iii. 44 The lower type, known as Perlmutter or iridescent clouds, show brilliant prismatic colours... They differ from noctilucent clouds by appearing almost exclusively in winter. 1963 New Scientist 25 July 169/2 There has been considerable dispute in the past about whether the noctilucent clouds are composed of ice particles or dust particles. 1995 Times 30 May 18/8 Another phenomenon to watch for during June and July evenings is that of noctilucent clouds which form at a height of about 80 km in high latitudes. This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022). < adj.1691
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