Lexical Definition

‎νόμισμα‎ nómisma (nom'-is-mah) coin ^G:N-N
from ‎νομίζω‎

money.

• what is reckoned as of value (after the Latin numisma), i.e. current coin

Abbott-Smith

νόμισμα, -τος, τό (< νομίζω), [in LXX: Es 8:36 (דָּת), Ne 7:71 R (דַּרְכְּמוֹן), I Mac 15:6*;]
1. that which is established by usage, a custom.
2. The current coin of a state: Mt 22:19.†

Abbott-Smith References

Liddell-Scott-Jones

νόμισμα-ισμα, ατος, τό,

anything sanctioned by current or established usage, custom, Ἑλληνικὸν ν. [Refs 5th c.BC+]; institution, οὐδὲν γὰρ ἀνθρώποισιν οἷον ἄργυρος κακὸν ν. ἔβλαστε [Refs 5th c.BC+] (do not pass current with us).

__II especially current coin, ν. κόψαι or κόψασθαι, coin money, [Refs 5th c.BC+]pieces of money, coins, [Refs 2nd c.AD+]
__III full legal measure, τοῦ χοῶς ἢ τῶν κοτυλῶν τὸ ν. διαλυμαίνεται [Refs 5th c.BC+]