Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

trēmis, issis, 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.