1An error in chronology, especially the placing of an event later than its real date. rare after 17th century.
= metachrony .
Early 17th century; earliest use found in John Hales (1584–1656), scholar. From Hellenistic Greek μετάχρονος anachronistic (from ancient Greek μετα- + χρόνος) + -ism; in sense 1 perhaps after anachronism.