|1.||a name, esp a place name, derived from the name of a real or mythical person, as for example Constantinople from Constantine I|
|2.||the name of the person from which such a name is derived: in the Middle Ages, "Brutus" was thought to be the eponym of "Britain"|
|[C19: from Greek epōnumos giving a significant name]|
eponym ep·o·nym (ěp'ə-nĭm')
A name of a drug, structure, or disease based on or derived from the name of a person.