Late Middle English (in an earlier sense). From classical Latin nummulārius of or relating to the changing of currency, also as noun, a kind of small-scale state banker from nummulus a coin + -ārius.
Definition of nummulary in US English:
nummulary
adjectiveˈnʌmjʊləri
rare
Of or relating to coinage or money. Now rare.
Origin
Late Middle English (in an earlier sense). From classical Latin nummulārius of or relating to the changing of currency, also as noun, a kind of small-scale state banker from nummulus a coin + -ārius.