- a plant (Armoracia lapathifolia) of the crucifer family, grown for its pungent, white, fleshy root
- a relish made of the grated root
- a. A coarse Eurasian plant (Armoracia rusticana) in the mustard family, having a thick, whitish, pungent root, large basal leaves, and white flowers in a terminal panicle.b. The roots of this plant.
- a. A sharp condiment made from the grated roots of this plant.b. Any of various pungent condiments resembling horseradish, such as wasabi.
(countable and uncountable, plural horseradishes)