'Borosilicate' definitions:

Definition of 'borosilicate'

(from WordNet)
noun
A salt of boric and silicic acids

Definition of 'Borosilicate'

From: GCIDE
  • Borosilicate \Bo"ro*sil"i*cate\, n. [Boron + silicate.] (Chem.) A double salt of boric and silicic acids, as in the natural minerals tourmaline, datolite, etc. [1913 Webster]