பொருள் : 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.
எடுத்துக்காட்டு :
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).
ஒத்த சொற்கள் : heliac