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parachronism

noun
pa·​rach·​ro·​nism | \paˈrakrəˌnizəm, pəˈr-\
plural -s

Definition of parachronism 

: a chronological error especially : one by which a date is set later than is correct — compare metachronism

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History and Etymology for parachronism

para- entry 1 + chron- + -ism

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