The Collaborative International Dictionary of English v.0.48:

Infumate \In"fu*mate\, v. t. [imp. & p. p. Infumated; p. pr. &
   vb. n. Infumating.] [L. infumatus, p. p. of infumare to
   infumate; pref. in- in + fumare to smoke, fr. fumus smoke.]
   To dry by exposing to smoke; to expose to smoke.
   [1913 Webster]