Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
eponym is a noun meaning "the person for whom something is named". It carries 2 recorded senses.
the name derived from a person (real or imaginary)
“Down's syndrome is an eponym for the English physician John Down”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for eponym come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.