Source : Webster's Revised Unabridged Dictionary (1913)

Oxymuriatic \Ox`y*mu`ri*at"ic\, a. [Oxy
   (a) + muriatic: cf. F. oxymuriatique.] (Chem.) Pertaining to,
       or consisting of, oxygen and muriatic acid, that is,
       hydrochloric acid. [Archaic.]

   {Oxymuriatic acid}, chlorine, formerly so called on the
      supposition that it was a compound of oxygen and muriatic
      acid. [Obs.]