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. [1913 Webster]