1. 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)"
   - heliac

See also: sun

Encyclopedia: Heliacal

• Old Prussian
• old rose
• old salt
• Old Saxon
• old school
• old school tie
• old sledge
• Old South
• old squaw
• old stager
• old style
• Old Style calendar
• old style font
• Old Testament
• old times
• old witch grass
• old wives' tale
• old woman
• Old World beaver
• Old World buffalo
• Old World chat
• Old World coot
• Old World coral snake
• Old World crayfish
• Old World flycatcher