prochronism
/ˈprəʊkrənɪz(ə)m
/noun
An error in chronology, in which an event is given an earlier date than the true one.Sir Thomas did not know that the prochronism which he thought absurd pervaded every part of organic structure....
- But if one means by the term what Petty meant by it, the prochronism is one of decades, not centuries.
Origin
Mid 17th century: from pro-2 'before' + Greek khronos 'time' + -ism.