The root of the perennial herb Armoracia rusticana (syn. Cochlearia armoracia, A. lapathifolia). Its pungency is caused by volatile oils (see glucosinolates). Used as a condiment, usually as a creamed sauce, or grated and mixed with beetroot (chrane). Japanese horseradish is Wasabia japonica; see wasabi.
Subjects: Cookery, Food, and Drink — Medicine and Health.