tetraobol
noun
tet·ra·obol ˌte-trə-ˈä-bəl 
-ˈō-
variants or tetrobol
te-ˈträ-bəl
or less commonly tetrobolon -ˈtrō-
te-ˈträ-bə-lən
-ˈtrō-
plural tetraobols or tetrobols also tetrobola te-ˈträ-bə-lə
-ˈtrō-
: a silver coin of ancient Greece worth four obols
Word History
First Known Use
1884, in the meaning defined above