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

• Lexulous
• Wordscraper
• Wordosaur

adj. Pertaining to a solstice.

adj. Occurring on a solstice.

adj. Of or pertaining to a solstice.

adj. Happening at a solstice; esp. (with reference to the northern hemisphere), happening at the summer solstice, or midsummer.

Of or pertaining to a solstice: as, a solstitial point.

Happening at a solstice—especially, with reference to the northern hemisphere, at the summer solstice, or midsummer.

"Parmenides was the first that confined the habitable world to the two solstitial (or temperate) zones."

solstitial armil    solstitial point   

equinoctial    german-based    extra-special    bicentennial    roof-mounted