Something named after someone. For example, a condition called Shiel syndrome might be named after (an eponym for) someone named Shiel who discovered it or who was the first to describe and clearly delineate it.

the name of a disease, structure, operation, or procedure, usually derived from the name of a place where it first occured or a person who discovered or described it first.

one whose name becomes that of a place, a people, an era, an institution, etc., 1833, from Greek eponymos "given as a name, giving one's name to something," as a plural noun (short for [..]

A single name under which several authors are published. Also, the name of a person or character so closely associated with a quality, process, or activity that the name is used in signifying it (Herc [..]

noun Definition: a word that contains or is based on a person's name Example Sentence: Atlas, a Titan in Greek mythology, is an eponym. The collection of maps we call an atlas got it's name from Atlas, the Titan, who was cursed to carry the sky on his shoulders.

(n) the person for whom something is named(n) the name derived from a person (real or imaginary)

a word that is derived from a name. Examples: Elizabethan

a type of noun or phrase that is based on a person's name (e.g., einsteinium, Student's t-test, gram-negative).

The name of a real or fictitious person whose name has, or is thought to have, given rise to the name of a particular item. ''Romulus is the eponym of Rome. A word formed from a real or fictive [..]

the name of someone so prominently connected with a time, place, group, or event as to become a figurative or symbolic designation for it.