\Gir"a*sole Gir"a*sol\, n. [It. girasole, or F.
girasol, fr. L. gyrare to turn around + sol sun.]
1. (Bot.) See {Heliotrope}. [Obs.]
2. (Min.) A variety of opal which is usually milk white,
   bluish white, or sky blue; but in a bright light it
   reflects a reddish color.