Source : Webster's Revised Unabridged Dictionary (1913)

Oxyhydrogen \Ox`y*hy"dro*gen\, a. [Oxy
   (a) + hydrogen.] (Chem.) Of or pertaining to a mixture of
       oxygen and hydrogen; as, oxyhydrogen gas.

   {Oxyhydrogen blowpipe}. (Chem.) See {Blowpipe}.

   {Oxyhydrogen microscope}, a form of microscope arranged so as
      to use the light produced by burning lime or limestone
      under a current of oxyhydrogen gas.