heliacal rising

British  

/ hɪˈlaɪəkəl /

noun

1. the rising of a celestial object at approximately the same time as the rising of the sun

2. the date at which such a celestial object first becomes visible in the dawn sky

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Etymology

Origin of heliacal rising

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

Example Sentences

Sothic, sō′thik, adj. of or pertaining to the dog-star Sothis or Sirius.—Sothic cycle, or period, a period of 1460 years; Sothic year, the ancient Egyptian fixed year, according to the heliacal rising of Sirius.

From Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) by Various

They approximated to the truth in reference to the solar year, by observing the equinoxes and solstices and the heliacal rising of particular stars.

From Beacon Lights of History, Volume 03 Ancient Achievements by Lord, John

The heliacal rising of Canopus was also a precursor of the rising of the Nile.

From Morals and Dogma of the Ancient and Accepted Scottish Rite of Freemasonry by Pike, Albert

They approximated to the truth in reference to the solar year, by observing the equinoxes and solstices, and the heliacal rising of particular stars.

From The Old Roman World, : the Grandeur and Failure of Its Civilization. by Lord, John

The heliacal rising of Orion is at present computed to be about the 6th of July; and about that time it is that he either causes or presages tempests on the seas.

From Discourses on Satire and on Epic Poetry by Dryden, John