/ Dictionary / Index P pentamerous: Meaning and Definition of Find definitions for: pen•tam•er•ous Pronunciation: (pen-tam'ur-us), [key] — adj. consisting of or divided into five parts. (of flowers) having five members in each whorl. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pentamerous (Thesaurus) pentalpha pentameter Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language