numismatics
From Longman Dictionary of Contemporary Englishnumismaticsnu‧mis‧mat‧ics /ˌnjuːməzˈmætɪks $ ˌnuː-/ noun [uncountable] DLHPECthe activity of collecting and studying coins and medalsOrigin numismatics (1700-1800) French numismatique, from Latin nomisma “coin”