noctilucent cloud
/ˌnɒktɪˈljuːsənt/noun
- a luminous cloud of a kind occasionally seen at night in summer in high latitudes, at the altitude of the mesopause夜光云。
词源
late 19th cent.: from Latin nox, noct- 'night' + lucere 'to shine' + -ENT.
| 单词 | noctilucent cloud |
| 释义 | noctilucent cloud/ˌnɒktɪˈljuːsənt/noun
词源 late 19th cent.: from Latin nox, noct- 'night' + lucere 'to shine' + -ENT. |
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