• (a.) Of or pertaining to phlogiston, or to belief in its existence. • (a.) Inflammatory; belonging to inflammations and fevers.
Phlo·gis'tic adjective 1. (Old Chem.) Of or pertaining to phlogiston, or to belief in its existence. 2. (Medicine) Inflammatory; belonging to inflammations and fevers. 
phlogistic 1. In medicine, relating to or inducing inflammation or fever; therefore, inflammatory.2. Capable of causing an inflammatory response.3. Impassioned; heated.