/ Dictionary / Index P pappus: Meaning and Definition of Find definitions for: pap•pus Pronunciation: (pap'us), [key] — pl. pap•pi a downy, bristly, or other tuftlike appendage of the achene of certain plants, as the dandelion and the thistle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pappus (Thesaurus) pappose pappy Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language