\De`phlo*gis"tic*cate\, v. t. [imp. & p. p.
{Dephlogisticated}; p. pr. & vb. n. {Dephlogisticating}.]
[Pref. de- + phlosticate: cf. F. d['e]phlogistiguer.] (O.
Chem.)
To deprive of phlogiston, or the supposed principle of
inflammability. --Priestley.
{Dephlogisticated air}, oxygen gas; -- so called by Dr.
   Priestly and others of his time. --
   {De`phlo*gis`ti*ca"tion}, n.