Source : Webster's Revised Unabridged Dictionary (1913)

Phlogisticate \Phlo*gis"ti*cate\, v. t. [imp. & p. p.
   {Phlogisticated}; p. pr. & vb. n. {Phlogisticating}.] (Old
   Chem.)
   To combine phlogiston with; -- usually in the form and sense
   of the p. p. or the adj.; as, highly phlogisticated
   substances.