criterion

Từ điển American Heritage Dictionary 4th

cri·te·ri·on (krī-tîrʹē-ən)n. pl. cri·te·ri·a (-tîrʹē-ə) or cri·te·ri·ons
A standard, rule, or test on which a judgment or decision can be based. See Synonyms at standard. [Greek kritērion, from kritēs, judge, from krīnein, to separate, judge. See krei- in Indo-European Roots.] cri·teʹri·al (-əl) adj. 
Usage Note: Like the analogous etymological plurals agenda and data, criteria is widely used as a singular form. Unlike them, however, it is not yet acceptable in that use.

• Từ đồng nghĩa / Synonyms:
  standard, measure, touchstone