Source : Webster's Revised Unabridged Dictionary (1913)

Numismatology \Nu*mis`ma*tol"o*gy\, n. [L. numisma, -atis +
   -logy.]
   The science which treats of coins and medals, in their
   relation to history; numismatics.

Source : WordNet®

numismatology
     n : the collection and study of money (and coins in particular)
         [syn: {numismatics}, {coin collecting}, {coin collection}]