Lēx, n.

n. [Lat. lex, legis, from legere, to gather, to read, to read aloud, to recite.] Law; as, lex talionis, the law of retaliation; lex terræ, the law of the land; lex fori, the law of the forum or court; lex loci, law of the place of the contract; lex mercatoria, the law or custom of merchants.