aphelion

n. 远日点

发音

UK /əˈfiː.lɪ.ən/
其它
UK /æpˈhiː.lɪ.ən/
US /əˈfi.li.ən/
US /əˈfil.jən/
US /æpˈhi.li.ən/
US /æpˈhil.jən/

词形变化

aphelia 复数 aphelia aphelions aphelions 复数

释义与例句

n.
  1. 1.

    The point in the elliptical orbit of a comet, planet, or other astronomical object, where it is farthest from the Sun.

    远日点

    比喻 天文

词汇关系

名词

反义词 1

perihelion

上位词 1

apoapsis

词源

From New Latin aphēlium (whence English aphelium, now displaced) + -ion (used in the names of other apsides). Aphelium was formed from Ancient Greek ἀπο- (apo-, prefix meaning ‘away, from, off’) + ἥλῐος (hḗlĭos, “the sun”) (ultimately from Proto-Indo-European *sóh₂wl̥ (“the sun”)), modelled after New Latin apogaeum (“apogee”). The plural form aphelia is from aphelion + -a (plural form of the suffix -on).

来源：wiktionary