The Collaborative International Dictionary
Cohobation \Co`ho*ba"tion\, n. [Cf. F. cohobation.] (Anc. Chem.)
The process of cohobating.
--Grew.
Wiktionary
n. (context dated chemistry English) The boiling of a material in a liquid with the repeated return of the distillate.
Wikipedia
In pre-modern chemistry and alchemy, cohobation was the process of repeated distillation of the same matter, with the liquid drawn from it; that liquid being poured again and again upon the matter left at the bottom of the vessel.
Cohobation is a kind of circulation, only differing from it in this, that the liquid is drawn off in cohobation, as in common distillation, and thrown back again; whereas in circulation, it rises and falls in the same vessel, without ever being drawn out.
Usage examples of "cohobation".
Sir, putrefaction, Solution, ablution, sublimation, Cohobation, calcination, ceration, and Fixation.