LAT

Lewis Short

trēmis (noun M) : formed after the analogy of semis, from tres and as; under the later emperors
* A coin, the third part of an aureus, Lampr. Alex. Sev. 39; Cod. Just. 12, 40, 3; cf. semis, II. A. 2.
Charlton T. Lewis, Charles Short, A Latin Dictionary
memory