perihelion

n. 近日点, 最高点, 顶点

发音

UK /ˌpɛɹ.ɪˈhiː.lɪ.ən/
其它
US /ˌpɛɹ.əˈhiː.li.ən/
US /ˌpɛɹ.əˈhil.jən/

词形变化

perihelia 复数 perihelia perihelions perihelions 复数

释义与例句

n.
  1. 1.

    The point in the elliptical orbit of a comet, planet, etc., where it is nearest to the Sun.

    近日点

    天文
  2. 2.

    The highest point or state; the peak, zenith.

    比喻

词汇关系

名词

反义词 1

aphelion

上位词 1

periapsis

词源

PIE word *sóh₂wl̥ From perihelium (“perihelion”) (obsolete) + -ion (suffix used for other names of apsides). Perihelium is borrowed from Late Latin perihelium, from Ancient Greek περι- (peri-, “around; surrounding”), ultimately from Proto-Indo-European *per- (“before, in front; first”)) + ἥλιος (hḗlios, “sun”) (ultimately from Proto-Indo-European *sóh₂wl̥ (“sun”)), which was modelled after perigeum (“point in an orbit about the Earth that is closest to the Earth, perigee”).

来源：wiktionary