Potassa

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Potassa \Po*tas"sa\, n. [NL., fr. E. potash.] (Chem.)
     (a) Potassium oxide. [Obs.]
     (b) Potassium hydroxide, commonly called {caustic potash}.
         [1913 Webster]