heliacal
Example Sentences
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Either the calendar did not originate in Egypt, or it was introduced in 2780 B.C., when again the heliacal rising Sothis fell on the first of Thoth.
From The Egyptian Conception of Immortality by Reisner, George Andrew
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
The heliacal rising of a constellation is when it comes from under the rays of the sun, and begins to appear before daylight.
From Discourses on Satire and on Epic Poetry by Dryden, John
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
The Egyptians had, at an early period, observed that the rising of the Nile coincided with the heliacal rising of Sirius, the Dog-star, and hence they very plausibly referred it to celestial agencies.
From History of the Intellectual Development of Europe, Volume I (of 2) Revised Edition by Draper, John William