Source : Webster's Revised Unabridged Dictionary (1913)

Oxyhydrogen light \Oxyhydrogen light\
   A light produced by the incandescence of some substances,
   esp. lime, in the oxyhydrogen flame. Coal gas (producing the
   {oxygas light}), or the vapor of ether ({oxyether light}) or
   methylated spirit ({oxyspirit light}), may be substituted for
   hydrogen.