/ Dictionary / Index P posology: Meaning and Definition of Find definitions for: po•sol•o•gy Pronunciation: (pu-sol'u-jē, pō-), [key] — n. the branch of pharmacology dealing with the determination of dosage. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: posology (Thesaurus) posole poss. Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language