extraposition
Concise Oxford English Dictionary © 2008 Oxford University Press:
extraposition /ˌɛkstrəpəˈzɪʃ(ə)n/
▶noun Grammar the placing of a word or words outside or at the end of a clause, while retaining the sense (e.g. it's no use crying over spilt milk).
'extraposition' also found in these Oxford entries:

