From en.wiktionary.org:
** Latin
*** Adjective
[la]
1. [la]
*** Noun
[posteriōra < 3.pl>]
1. posterior regions, behind , arse
2. * [Martin Luther] in a letter to [Philip Melanchthon] , 5 December 1521, from the _[Weimarer Ausgabe]_ BR 2, page 333
3. *: Dominus percussit me in POSTERIORA gravi dolore; tam durus sunt excrementa, ut multa vi ad sudorem extrudere cogar, et quo diutius differo, magis durescunt.
4. *:: The Lord has struck me in the posterior with great suffering; so hard are my excrements, that I am forced to push them out with great strain to the point of sweat, and when I put it off, they become harder.
**** Declension
[posteriōra < 3.pl>]
*** References
- [R:du Cange]