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

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