aphelion

aphelion
aphelian, adj.
/euh fee"lee euhn, euh feel"yeuhn, ap hee"lee euhn/, n., pl. aphelia /euh fee"lee euh, euh feel"yeuh, ap hee"lee euh/.
Astron. the point in the orbit of a planet or a comet at which it is farthest from the sun. Cf. perihelion.
[1650-60; Hellenized form of NL aphelium < Gk *aphélion (diástema) off-sun (distance), neut. of *aphélios (adj.), equiv. to ap- AP-2 + héli(os) sun + -os adj. suffix. See APOGEE]

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  • aphelion — (n.) point farthest from the sun (of a celestial body s orbit), 1670s, a Grecianized form of Mod.L. aphelium, altered by Johannes Kepler based on Gk. apo heliou away from the sun, from apo away from (see APO (Cf. apo )) + heliou, gen. of helios… …   Etymology dictionary

  • aphelion — ► NOUN (pl. aphelia) ▪ the point in a planet s orbit at which it is furthest from the sun. ORIGIN from Greek aph h lion from the sun …   English terms dictionary

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  • aphelion — a•phe•li•on [[t]əˈfi li ən, əˈfil yən, æpˈhi li ən[/t]] n. pl. a•phe•li•a [[t]əˈfi li ə, əˈfil yə, æpˈhi li ə[/t]] astron. the point in the orbit of a planet or a comet at which it is farthest from the sun Compare perihelion • Etymology: 1650–60; …   From formal English to slang

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  • aphelion — noun (plural aphelia) Etymology: New Latin, from apo + Greek hēlios sun more at solar Date: 1656 the point in the path of a celestial body (as a planet) that is farthest from the sun compare perihelion …   New Collegiate Dictionary

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