Hardy perennial plant (Armoracia lapathifolia) of the mustard family, native to Mediterranean lands and grown throughout the temperate zones. Its hotly pungent, fleshy root is used as a condiment and is traditionally considered medicinal. In many cool, moist areas it has become a troublesome weed. The plant bears small white flowers, small oblong pods, and large, coarse, glossy-green basal leaves arising on long stems from the crown atop the large white root.
1. Horseradish is a small white vegetable that is the root of a crop. It has a very strong sharp taste and is often made into a sauce. 2. Horseradish or horseradish sauce is a sauce made from horseradish. It is often eaten with roast beef.