Lewis Short
(adjective) : sācōmārĭus, a, um, sacoma
* Serving for a counterpoise, used for a weight in a balance: cucurbitae,Hier. in Jon. 4, 6.—Hence, substt.
* Sācōmārĭus, ii, m., one who makes counterpoises or weights in gen.; called also PONDERARIVS,Inscr. Orell. 4274.
* Sācōmārĭum, ii, n., the public balance or weighing place, Inscr. Orell. 4109; 7194.
Charlton T. Lewis, Charles Short, A Latin Dictionary