or pen·ny cress, pen·ny-cress
any of several plants belonging to herbs of the genus Thlaspi, of the mustard family, especially T. arvense, of Europe, bearing somewhat round, flat pods.
Origin of pennycress
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any of several plants of the genus Thlaspi of temperate Eurasia and North America, typically having small white or mauve flowers and rounded or heart-shaped leaves: family Brassicaceae (crucifers)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012