n. [ L. nasturtium, for nasitortium, fr. nasus nose + torquere, tortum, to twist, torture, in allusion to the causing one to make a wry face by its pungent taste. See Nose of the face, and Torture. ] 1. (Bot.) A genus of cruciferous plants, having white or yellowish flowers, including several species of cress. They are found chiefly in wet or damp grounds, and have a pungent biting taste. [ 1913 Webster ]

2. (Bot.) Any plant of the genus Tropaeolum, geraniaceous herbs, having mostly climbing stems, peltate leaves, and spurred flowers, and including the common Indian cress (Tropaeolum majus), the canary-bird flower (Tropaeolum peregrinum), and about thirty more species, all natives of South America. The whole plant has a warm pungent flavor, and the fleshy fruits are used as a substitute for capers, while the leaves and flowers are sometimes used in salads. [ 1913 Webster ]