D defs.my
Entry 2 senses Webster, 1913

Solstitial

· Sol·sti·tial · IPA /sɒlˈstɪʃ.əl/
01 a. Of or pertaining to a solstice.
  1. 1.
    Of or pertaining to a solstice.
  2. 2.
    Happening at a solstice; esp. (with reference to the northern hemisphere), happening at the summer solstice, or midsummer.