a posteriori
Concise Oxford English Dictionary © 2008 Oxford University Press:
a posteriori /eɪ, ɑː, pɒˌstɛrɪˈɔːrʌɪ, pɒˌstɪə-/
▶adjective & adverb
- 1 (with reference to reasoning or knowledge) proceeding from observations or experiences to the deduction of probable causes.
- 2 as an afterthought or with hindsight.
– origin C17: L., ‘from what comes after’.
'a posteriori' also found in these Oxford entries:

