GNU Collaborative International Dictionary of English

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1.       
   Nasturtium , 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.]
   (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
   (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