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1. (adj.) heliacal
pertaining to or occurring near the sun, esp. applied to such risings and settings of a star as most nearly coincide with sunrise or sunset.
Etymology: (1600–10; < LL hēliac(us) (< Gk hēliakós; see helio -, -ac ) + -al1)
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| Definition of 'heliacal' |
Princeton's WordNet |
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1. (adj) heliacal, heliac
pertaining to or near the sun; especially the first rising of a star after and last setting before its invisibility owing to its conjunction with the sun
"the heliacal rising of the Dog Star"; "the heliacal or Sothic year is determined by the heliacal rising of Sothis (the Egyptian name for the Dog Star)"
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| Definition of 'heliacal' |
Webster Dictionary |
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1. (adj) heliacal
emerging from the light of the sun, or passing into it; rising or setting at the same, or nearly the same, time as the sun
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Definitions of heliacal 
