/ Dictionary / Index P physo-: Meaning and Definition of Find definitions for: physo- Pronunciation: [key] a combining form meaning “bladder,” used in the formation of compound words: physogastric. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. physis physoclistous Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language