heliacal rising

/ (hɪˈlaɪəkəl) /

noun

the rising of a celestial object at approximately the same time as the rising of the sun
the date at which such a celestial object first becomes visible in the dawn sky

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Word Origin for heliacal rising

C17: from Late Latin hēliacus relating to the sun, from Greek hēliakos, from hēlios the sun

Words nearby heliacal rising

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012