tremissis
noun
a gold coin of the Eastern Roman Empire, the third part of a solidus, first issued in the 3rd century a.d.
The grammatical form denoting more than one person, place, thing, or idea.
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The Solidus is of two kinds; one contains two tremisses, that is, a beeve of twelve months, or a sheep with its lamb; the other, three tremisses, or a beeve of sixteen months.
From The Germany and the Agricola of Tacitus by Tacitus, Cornelius