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criterion

[krahy-teer-ee-uh n] /kraɪˈtɪər i ən/
noun, plural criteria
[krahy-teer-ee-uh] /kraɪˈtɪər i ə/ (Show IPA),
criterions.
1.
a standard of judgment or criticism; a rule or principle for evaluating or testing something.
Origin
1605-1615
1605-15; < Greek kritḗrion a standard, equivalent to kri- variant stem of krī́nein to separate, decide + -tērion neuter suffix of means (akin to Latin -tōrium -tory2)
Related forms
criterial, adjective
Can be confused
criteria, criterion (see usage note at the current entry)
Synonyms
measure, touchstone, yardstick. See standard.
Usage note
Like some other nouns borrowed from the Greek, criterion has both a Greek plural, criteria, and a plural formed on the English pattern, criterions. The plural in -a occurs with far greater frequency than does the -s plural: These are the criteria for the selection of candidates. Although criteria is sometimes used as a singular, most often in speech and only infrequently in edited prose, in standard English, it is more clearly used as a plural with criterion as the singular.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for criterial

criterion

/kraɪˈtɪərɪən/
noun (pl) -ria (-rɪə), -rions
1.
a standard by which something can be judged or decided
2.
(philosophy) a defining characteristic of something
Usage note
Criteria, the plural of criterion, is not acceptable as a singular noun: this criterion is not valid; these criteria are not valid
Word Origin
C17: from Greek kritērion from kritēs judge, from krinein to decide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for criterial

criterion

n.

1660s, from Latinized form of Greek kriterion "means for judging, standard," from krites "judge," from PIE root *krei- (see crisis). Used in English as a Greek word from 1610s.

Online Etymology Dictionary, © 2010 Douglas Harper
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