Source : Webster's Revised Unabridged Dictionary (1913)

Bituminate \Bi*tu"mi*nate\ (b[i^]*t[=u]"m[i^]*n[=a]t), v. t.
   [imp. & p. p. {Bituminated}; p. pr. & vb. n. {Bituminating}.]
   [L. bituminatus, p. p. of bituminare to bituminate. See
   {Bitumen}.]
   To treat or impregnate with bitumen; to cement with bitumen.
   ``Bituminated walls of Babylon.'' --Feltham.