/ Dictionary / Index P pathognomonic: Meaning and Definition of Find definitions for: pa•thog•no•mon•ic Pronunciation: (pu-thog"nu-mon'ik), [key] characteristic or diagnostic of a specific disease: a pathognomonic sign of pneumonia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pathogenicity pathognomy Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language