DICT.TW Dictionary Taiwan

 He·li·ac a. Heliacal.
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 heliac
      adj : 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)" [syn: heliacal]