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Dephlegmate \De*phleg"mate\, v. t. [imp. & p. p. {Dephlegmated}; p. pr. & vb. n. {Dephlegmating}.] [See {Dephlegm}.] (Chem.) To deprive of superabundant water, as by evaporation or distillation; to clear of aqueous matter; to rectify; -- used of spirits and acids.