A rarely used or non-standard English plural of criterion, though 'criteria' is the correct and standard plural form.
From Latin 'criterium' with English pluralization '-s.' While technically incorrect by Latin grammar, '-ons' appears in some dialects or older texts.
Some dictionaries actually list 'criterions' as acceptable English—reminding us that language rules are descriptive, not prescriptive, and English is slowly making criterion easier to pluralize.
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