criterion Synonyms

measure standard touchstone rule parameter test yardstick benchmark basis specification principle litmus test baseline law of nature hallmark thermometry algometry test case angstrom tenet rhythmus probation proof prototype qualification requirement requisite parameters scale shibboleth mark mil gold standard bench mark procrustean bed parametric pop quiz Richter scale standards norms precedents earned run average densitometry measuring rod point of reference reference point criterium genotype biotype plumb line