The Collaborative International Dictionary of English v.0.48:

Humect \Hu*mect"\, Humectate \Hu*mec"tate\, v. t. [L. humectare,
   humectatum, fr. humectus moist, fr. humere to be moist: cf.
   F. humecter.]
   To moisten; to wet. [Obs.] --Howell.
   [1913 Webster]