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.]

Source: Webster's Revised Unabridged Dictionary (1913)