Heliac

a.

1.

Heliacal.

Adj.

1.

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)" Synonyms: heliacal

heliacal, sun