eponym

[ ep-uh-nim ]
/ ˈɛp ə nɪm /

noun

a person, real or imaginary, from whom something, as a tribe, nation, or place, takes or is said to take its name: Brut, the supposed grandson of Aeneas, is the eponym of the Britons.
a word based on or derived from a person's name.
any ancient official whose name was used to designate his year of office.

Origin of eponym

First recorded in 1840–50; back formation from eponymous

Related forms

ep·o·nym·ic, adjective
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Examples from the Web for eponym

British Dictionary definitions for eponym

eponym

/ (ˈɛpəˌnɪm) /

noun

a name, esp a place name, derived from the name of a real or mythical person, as for example Constantinople from Constantine I
the name of the person from which such a name is derivedin the Middle Ages, "Brutus" was thought to be the eponym of "Britain"

Derived Forms

eponymic, adjective

Word Origin for eponym

C19: from Greek epōnumos giving a significant name
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for eponym

eponym

[ ĕpə-nĭm′ ]

n.

A name of a drug, structure, or disease based on or derived from the name of a person.

Related forms

ep′o•nymic adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.