What is "metachronism"

Metachronism \Me*tach"ro*nism\, n. [Gr. ?, ?, after the time, happening afterward; ? beyond + ? time: cf. F. m['e]tachronisme.] An error committed in chronology by placing an event after its real time.

n. An error in chronological ordering in which a character or an event is placed at too late a time.