tremissis

[trih-mis-is]

noun

plural

tremisses 

1. Also called triens. a gold coin of the Eastern Roman Empire, the third part of a solidus, first issued in the 3rd century a.d.

2. a Merovingian gold coin imitating this.

Word History and Origins

Origin of tremissis¹

1700–10; < Late Latin trēmissis, equivalent to Latin trē ( s ) three + -missis as in sēmissis, Late Latin form of Latin sēmis semis (falsely analyzed as sē- + -missis )