- any of various plants of the mustard family, especially the watercress, having pungent-tasting leaves often used for salad and as a garnish.
- any of various similar plants.
- any of various plants of the genera Lepidium, Cardamine, Arabis, etc, having pungent-tasting leaves often used in salads and as a garnish: family Brassicaceae (crucifers)
