evection
/ih-vek-shuhn/US // ɪˈvɛk ʃən //UK // (ɪˈvɛkʃən) //
夕阳红,夕阳西下,夕阳
Definitions
n.名词 noun
- 1
Astronomy.
- : a periodic irregularity in the moon's motion, caused by the attraction of the sun.
Examples
His chief discovery was an irregularity of the lunar motion, called the ‘evection.’
This he called the evection, and introduced another epicycle to represent it.
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