sassolin

Century Dictionary and Cyclopedia

1. n. Native boracic acid, H₃BO₃, occurring more or less pure in irregular six-sided laminæ belonging to the triclinic system, or as a crust, or in stalactitic forms composed of small scales. It is white or yellowish, has a nacreous luster, and is friable. It occurs as a deposit from hot springs and ponds in the lagoons of Tuscany, and was first discovered near Sasso (whence the name) in the province of Florence.

GNU Webster's 1913

1. n. (Min.) Native boric acid, found in saline incrustations on the borders of hot springs near Sasso, in the territory of Florence.