/ Dictionary / Index P Pierides: Meaning and Definition of Find definitions for: Pi•e•ri•des Pronunciation: (pī-er'i-dēz"), [key] — n.pl. Class. Myth. the Muses. nine Thessalian maidens who challenged the Muses to a singing contest, lost, and were changed into magpies for insulting the victors. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pierid Piero della Francesca Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language