dephlegmate

from The Century Dictionary.

• To deprive of superabundant water, as by evaporation or distillation; rectify: said of spirits or acids.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb (Chem.) To deprive of superabundant water, as by evaporation or distillation; to clear of aqueous matter; to rectify; -- used of spirits and acids.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb chemistry, dated To deprive of superabundant water, as by evaporation or distillation; to clear of aqueous matter; to rectify; used of spirits and acids.