The Collaborative International Dictionary
Cohobate
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.
Wiktionary
cohobate
vb. (context chemistry alchemy English) To treat a material with a boiling liquid and repeatedly return the distillate.