Norm
来自Big Physics
early 19th century: from Latin norma ‘precept, rule, carpenter's square’.
wiktionary
From French norme, from Old French, from Latin norma(“a carpenter's square, a rule, a pattern, a precept”).
Back-formation from normed.
etymonline
norm (n.)
"a standard, pattern, or model," 1821 (Coleridge), from French norme, from Latin norma "carpenter's square, rule, pattern," a word of unknown origin. Klein suggests a borrowing (via Etruscan) of Greek gnōmōn "carpenter's square." The Latin form of the word, norma, was used in English in the sense of "carpenter's square" from 1670s, also as the name of a small, faint southern constellation introduced 18c. by La Caille.
