Lewis Short
exăgĭum (noun N) : ex-ago; cf. examen, II.
* A weighing, weight; a balance (late Lat.), Theod. et Val. Nov. 25; Inscr. Orell. 3166; cf. Ἐξάγιοϝ pensatio; ἐξαγιάζω examino, Gloss. Philox.
Charlton T. Lewis, Charles Short, A Latin Dictionary