Pronunciation: (hôrs'rad"ish),[key] —n. 1. a cultivated plant, Armoracia rusticana, of the mustard family, having small, white flowers.
2. the pungent root of this plant, ground and used as a condiment and in medicine.
3. the condiment itself, sometimes moistened with vinegar or mixed with ground beets.
—adj. of or containing ground horseradish as a flavoring: brisket of beef with horseradish sauce.