The Collaborative International Dictionary of English v.0.48:

Vaporize \Vap"o*rize\ (v[a^]p"[-o]*r[imac]z or
   v[=a]"p[~e]r*[imac]z), v. t. [imp. & p. p. Vaporized
   (-r[imac]zd); p. pr. & vb. n. Vaporizing
   (-r[imac]`z[i^]ng).] [Cf. F. vaporiser.]
   To convert into vapor, as by the application of heat, whether
   naturally or artificially.
   [1913 Webster]

   Vaporizing surface. (Steam Boilers) See Evaporating
      surface, under Evaporate, v. t.
      [1913 Webster]