heliacally

From heliacal +‎ -ly.

heliacally (not comparable)

1. (astronomy) In a heliacal manner; with the rising or setting sun.
   • 1843 November, Thomas De Quincey, “Ceylon”, in Speculations Literary and Philosophic: With German Tales and Other Narrative Papers (De Quincey’s Works; XII), London: James Hogg & Sons, →OCLC, page 37:

     Ceylon has this one disadvantage for purposes of theatrical effect; she is like a star rising heliacally, and hidden in the blaze of the sun: any island, however magnificent, becomes lost in the blaze of India.

   • 1953, B. L. van der Waerden, “History of the Zodiac”, in Archiv für Orientforschung, volume 16, page 219:

     However from the list of heliacally rising stars in ^mulAPIN it is quite clear that AL.LUL must include Prokyon.

• “heliacally”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.