Source : Webster's Revised Unabridged Dictionary (1913)

Empyreumatic \Em`py*reu*mat"ic\, Empyreumatical
\Em`py*reu*mat"ic*al\, a. [Cf. F. empyreumatique.]
   Of or pertaining to empyreuma; as, an empyreumatic odor.

   {Empyreumatic oils}, oils obtained by distilling various
      organic substances at high temperatures. --Brande & C.