the root of the horseradish plant; it is grated or ground and used for seasoning
source: WordNet 3.0
coarse Eurasian plant cultivated for its thick white pungent root
source: WordNet 3.0
grated horseradish root
source: WordNet 3.0
A plant of the genus Nasturtium (N. Armoracia), allied to scurvy grass, having a root of a pungent taste, much used, when grated, as a condiment and in medicine.