heliac's Usage Examples:

(4) Astronomical data, especially the heliacal risings of Sothis recorded by dates of their celebration in the vague year.

a The possibility should not, however, be overlooked that the " stars of the months " were determined by their heliacal risings (see Bosanquet and Sayce on Babylonian astronomy, in Monthly Notices Roy.

heliacal setting occurs when a planet or star enters into conjunction with the Sun.

The heliacal rising of Sirius would tell people to prepare for the floods.

They are found in the Compoeitae (Cickoriaceae), Campanulaceae, Papaveraceae, Loheliaceae, Papayaceae, in some Aroideae and Musaceae, and in Euphorbiaceae (Manihot, Ilevea).

heliacal rising of Sirius would tell people to prepare for the floods.

A set of twenty-eight rhymes associated their heliacal risings with the changes of season and the vicissitudes of nomad life; their settings were of meteorological and astrological import; 3 in the Koran (x.