Lewis Short
trĭmŏdĭa | trĭmŏ-dĭum, ii (noun F.n) : f. (collat. form , , n., Plaut. Men. prol. 15; Plin. 33, 1, 6, § 20) [tres-modius]
* A vessel that contains three modii, a three-peck measure, Varr. ap. Non. 5, 18; Col. 2, 9, 9; 12, 18, 2; 12, 52, 8.
Charlton T. Lewis, Charles Short, A Latin Dictionary