/ Dictionary / Index P plumule: Meaning and Definition of Find definitions for: plu•mule Pronunciation: (plm'yl), [key] — n. the bud of the ascending axis of a plant while still in the embryo. a down feather. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: plumule (Thesaurus) plumulaceous plumulose Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language