/ Dictionary / Index P pennycress: Meaning and Definition of Find definitions for: pen•ny•cress Pronunciation: (pen'ē-kres"), [key] — n. any of several plants belonging to herbs of the genus Thlaspi, of the mustard family, esp. T. arvense, of Europe, bearing somewhat round, flat pods. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pennycress (Thesaurus) penny arcade penny dreadful Related Content Daily Word Quiz: jaundice Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language