Meaning of heliacal

he•li•a•cal

Pronunciation: (hi-lī'u-kul), [key]
— adj. Astron.
  1. pertaining to or occurring near the sun, esp. applied to such risings and settings of a star as are most nearly coincident with those of the sun while yet visible.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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