a. [ Pyro- + acetic: cf. F. pyroacétique. ] (Chem.) Pertaining to, and designating, a substance (acetone) obtained by the distillation of the acetates. It is now called also pyroacetic ether, and formerly was called pyroacetic spirit. [ 1913 Webster ]
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 ]
n. [ Pyro- + catechu. ] (Chem.) A white crystalline substance, C6H4(OH)2, of the phenol series, found in various plants; -- so called because first obtained by distillation of gum catechu. Called also catechol, oxyphenol. etc. [ 1913 Webster ]
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