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heliacal rising
British
/ 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
Etymology
Origin of heliacal rising
C17: from Late Latin hēliacus relating to the sun, from Greek hēliakos, from hēlios the sun
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
