peppergrass definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of a genus (Lepidium) of small plants of the crucifer family, with small, whitish flowers and flattened pods, esp. the garden cress
peppergrass definition by American Heritage Dictionary
Any of several plants of the genus Lepidium, especially the North American species L. virginicum, having small white flowers and pungent foliage and seeds. Also called peppercress, pepperwort.