/ Dictionary / Index P phlogistic: Meaning and Definition of Find definitions for: phlo•gis•tic Pronunciation: (flō-jis'tik), [key] — adj. inflammatory. pertaining to or consisting of phlogiston. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phloem ray phlogiston Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language