numismatics Syllabification: (nu·mis·mat·ics)Pronunciation: /ˌn(y)o͞oməzˈmatiks, -məs-/Definition of numismatics noun [usually treated as singular] the study or collection of coins, paper currency, and medals. Derivatives numismatistPronunciation: /n(y)o͞oˈmizmətist, -ˈmis-/ noun numismatics in other Oxford dictionaries Definition of numismatics in the British & World English dictionary