re·du·pli·ca·tion (rĭ-d′plĭ-kāshən, -dy′-)
1. The act of reduplicating or the state of being reduplicated.
2. The product or result of reduplicating.
a. A word formed by or containing a reduplicated element.
b. The added element in a word form that is reduplicated.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.