Definitions

1. noun

A person or thing after whom or which something is named, typically a person after whom a disease, discovery, or concept is named.

“The eponym of the law is a man who lived in the 19th century.”

2. noun

A word derived from the name of a person, place, or thing, typically a person after whom a concept or disease is named.

“The term ‘Darwinism’ is an example of an eponym.”