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单词 aphelian
释义

WordReference Random House Learner's Dictionary of American English © 2024
a•phe•li•on /əˈfiliən/USA pronunciation   n. [countable], pl. a•phe•li•a 
    /əˈfiliə/.USA pronunciation  
  1. Astronomythe point in the orbit of a planet or a comet when it is farthest from the sun.Compareperihelion.
See -helio-.
WordReference Random House Unabridged Dictionary of American English © 2024
a•phe•li•on  (ə fē′lē ən, ə fēl′yən, ap hē′lē ən),USA pronunciation n., pl. a•phe•li•a 
    (ə fē′lē ə, ə fēl′yə, ap hē′lē ə).USA pronunciation 
  1. Astronomythe point in the orbit of a planet or a comet at which it is farthest from the sun. Cf. perihelion.
  • Greek *aphé̄lion (diástēma) off-sun (distance), neuter of *aphé̄lios (adjective, adjectival), equivalent. to ap- ap-2 + hé̄li(os) sun + -os adjective, adjectival suffix. See apogee
  • Hellenized form of Neo-Latin aphēlium 1650–60
a•phe′li•an, adj. 
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更新时间：2026/6/18 14:58:03