Meaning : 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.
Example :
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 : heliac
Heliacal meaning in Bengali (Bangla).