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.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.