G3551 νόμος (nómos)

KJV renderings: law
Strong's definition: law (through the idea of prescriptive usage), genitive case (regulation), specially, (of Moses (including the volume); also of the Gospel), or figuratively (a principle)
Derivation: from a primary (to parcel out, especially food or grazing to animals);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.