'H2B4O7' definitions:

Definition of 'H2B4O7'

From: GCIDE

Pyroboric \Pyr`o*bo"ric\, a. [Pyro- + boric.] (Chem.) Pertaining to derived from, or designating, an acid, H2B4O7 (called also tetraboric acid), which is the acid ingredient of ordinary borax, and is obtained by heating boric acid. [1913 Webster]