What is "metacetone"

Metacetone \Me*tac"e*tone\, n. [Pref. met- + acetone.] (Chem.) A colorless liquid of an agreeable odor, C6H10O, obtained by distilling a mixture of sugar and lime; -- so called because formerly regarded as a polymeric modification of acetone.

n. (context chemistry English) C₆H₁₀O, a colourless liquid obtained by distilling a mixture of sugar and lime.