1. A word or name derived from a proper noun. The words atlas, bowdlerize, denim, and Turing machine are eponyms.
2. One whose name is or is thought to be the source of the name of something: Alexander Garden is the eponym of the gardenia.
[French éponyme, from Greek epōnumos, named after : epi-, epi- + onoma, onuma, name; see n-men- in the Appendix of Indo-European roots.]
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.