νόμ-ισμα · nom-isma — LSJ
anything sanctioned by current, established usage, custom, institution, pass current
anything sanctioned by current or established usage, custom, Ἑλληνικὸν ν. A. Th. 269, cf. E. IT 1471; institution, οὐδὲν γὰρ ἀνθρώποισιν οἷον ἄργυρος κακὸν ν. ἔβλαστε S. Ant. 296; θεοὶ ἡμῖν ν. οὐκ ἔστι Ar. Nu. 248, with a play on signf. II (do not pass current with us).
II current coin, money, pieces of money, coins
esp. current coin, ν. κόψαι or κόψασθαι, coin money, Hdt. 3.56, 4.166; τἀρχαῖον ν. Ar. Ra. 720; ν. σύμβολον τῆς ἀλλαγῆς ἕνεκα Pl. R. 371b, cf. Arist. EN 1133b11, Pol. 1257a11, D.L. 6.20; τάλαντα νομίσματος And. 3.8; ν. ἡμεδαποῦ IG 1(2).91.4; τὸ ἐπιχώριον ν. PCair.Zen. 21.12 (iii B.C.): pl. νομίσματα pieces of money, coins, Hdn. 1.9.7.
III full legal measure
full legal measure, τοῦ χοῶς ἢ τῶν κοτυλῶν τὸ ν. διαλυμαίνεται Ar. Th. 348.