单词 | aphelion |
释义 | 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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