anachronism

Concise Oxford English Dictionary © 2008 Oxford University Press:
anachronism /əˈnakrəˌnɪz(ə)m/

▶noun

• 1 a thing belonging or appropriate to a period other than that in which it exists.

• 2 the attribution of something to a period to which it does not belong.

– derivatives
anachronic /ˌanəˈkrɒnɪk/ adjective,
anachronistic adjective,
anachronistically adverb.

– origin C17: from Gk anakhronismos, from ana- ‘backwards’ + khronos ‘time’.