a peppergrass, Lepidium sativum, used as a salad vegetable.
Origin of garden cress
First recorded in 1570–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for garden cress
a pungent-tasting plant, Lepidium sativum, with white or reddish flowers: cultivated for salads, as a garnish, etc: 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