This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of or relating to the sun, especially rising and setting with the sun.

adj. Of or relating to the sun, especially rising and setting with the sun.

adj. Emerging from the light of the sun, or passing into it; rising or setting at the same, or nearly the same, time as the sun.

In old astronomy and chronology, near the sun: applied to those risings and settings of a star which were as nearly coincident with those of the sun as they could be observed.

adj. 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

"These are the dog days, the days about the heliacal rising of the Dog Star, noted from ancient times as the hottest and most unwholesome period of the year, a period when malevolent influences were thought to prevail."