| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024a•phe•li•on /əˈfiliən/USA pronunciation n. [countable], pl. a•phe•li•a /əˈfiliə/.USA pronunciation - 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 © 2024a•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 - 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
Collins Concise English Dictionary © HarperCollins Publishers:: aphelion /æpˈhiːlɪən əˈfiː-/ n ( pl -lia / -lɪə/)- the point in its orbit when a planet or comet is at its greatest distance from the sun
Etymology: 17th Century: from New Latin aphēlium (with pseudo-Greek ending -ion) from ap- + Greek hēlios sun |