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.
© Webster 1913.