Pyroacetic \Pyr`o*a*ce"tic\, a. [Pyro- + acetic: cf. F.
pyroac['e]tique.] (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]