carolus

[kar-uh-luh s] /ˈkær ə ləs/
noun, plural caroluses, caroli
[kar-uh-lahy] /ˈkær əˌlaɪ/ (Show IPA)
1.
any of various coins issued under monarchs named Charles, especially the broad of Charles I of England.
Origin
1680-90; < Medieval Latin: Latinized form of Charles or Karl
British Dictionary definitions for carolus

carolus

/ˈkærələs/
noun (pl) -luses, -li (-ˌlaɪ)
1.
any of several coins struck in the reign of a king called Charles, esp an English gold coin from the reign of Charles I