De·phlo·gis·tic·cate v. t. [imp. & p. p. Dephlogisticated p. pr. & vb. n. Dephlogisticating.]  O. Chem. To deprive of phlogiston, or the supposed principle of inflammability.
  Dephlogisticated air, oxygen gas; -- so called by Dr. Priestly and others of his time.
  -- De*phlo*gis*ti*ca*tion n.
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