noun, plural tremisses /-ˈmɪsiz/ [-mis-eez] Show IPA .
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.
a Merovingian gold coin imitating this.
< Late Latin trēmissis,
equivalent to Latin trē
as in sēmissis, Late Latin
form of Latin sēmis semis
(falsely analyzed as sē-