An Etymological Dictionary of Astronomy and Astrophysics

Of or near the → Sun, especially rising and setting with the Sun. → heliacal rising, → heliacal setting.

Etymology (EN): Heliacal “pertaining to the sun,” from Gk. heliakos “of the sun,” from helios, → sun; cognate with Pers. hur, as below.

Etymology (PE): Hurâné “sunlike,” since the star rises in the morning like the Sun, from hur “sun”, variant xor;
Mid.Pers. xvar “sun;” Av. hû-, hvar- “sun;” Skt.
surya-; L. sol; O.H.G. sunna; Ger. Sonne; E. sun;
PIE *sawel- “sun” + -âné similarity suffix.