1. (noun)horseradish, horseradish root the root of the horseradish plant; it is grated or ground and used for seasoning Synonyms: horseradish root, red cole, horseradish, horse radish
2. (noun)horseradish, horse radish, red cole, Armoracia rusticana coarse Eurasian plant cultivated for its thick white pungent root Synonyms: horseradish root, red cole, horseradish, horse radish