1. Of, relating to, or constituting an eponym.
2. Named after something else or deriving from an existing name or word: "Programs such as He-Man and Masters of the Universe ... were all created with the explicit purpose of selling the eponymous toys to children" (Susan Gregory Thomas).
[From Greek epōnumos; see EPONYM.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.