Source : Webster's Revised Unabridged Dictionary (1913)

Cohobate \Co`ho*bate\, v. t. [imp. & p. p. {Cohobated}; p. pr. &
   vb. n. {Cohobating}.] [LL. cohobare; prob. of Arabic origin:
   cf. F. cohober.] (Anc. Chem.)
   To repeat the distillation of, pouring the liquor back upon
   the matter remaining in the vessel. --Arbuthnot.