auctarium
From LSJ
διὰ λαμπροτάτου βαίνοντες ἁβρῶς αἰθέρος → passing lightly through clear-shining air (Euripides, Medea 829)
Latin > English (Lewis & Short)
auctārĭum: ii, n. augeo,
I an addition or augmentation of a definite measure: auctarium dicebant antiqui, quod super mensuram vel pondus justum adiciebatur, Paul. ex Fest. p. 14 Müll.: Eu. Tanti quanti poscit, vin tanti illum emi? Ch. Immo auctarium Adicito, Plaut. Merc. 2, 4, 23.
Latin > French (Gaffiot 2016)
auctārĭum, ĭī, n. (augeo), surplus, ce qui fait la bonne mesure : Pl. Merc. 490 ; P. Fest. 14.