/ Dictionary / Index P polyadelphous: Meaning and Definition of Find definitions for: pol•y•a•del•phous Pronunciation: (pol"ē-u-del'fus), [key] — adj. Bot. (of stamens) united by the filaments into three or more sets or bundles. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. polyacrylonitrile polyadenylic acid Related Content Daily Word Quiz: modify Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language