单词 | heliacal rising |
释义 | Word Frequency heliacal rising rising of a celestial object at approximately the same time as the rising of the sun Word Frequency heliacal rising(hɪˈlaɪəkəl) noun 1. the rising of a celestial object at approximately the same time as the rising of thesun 2. the date at which such a celestial object first becomes visible in the dawn sky Word origin C17: from Late Latin hēliacus relating to the sun, from Greek hēliakos, from hēlios the sun |
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