posterieure
Posterieure is not a standard or widely recognized term in major dictionaries or technical vocabularies. In contemporary use, it is most often treated as a possible misspelling or variant of French postérieure or postérieur, words that designate the rear or back part of something, such as the posterior aspect of an organism or structure. Because postérieur (masculine) and postérieure (feminine) are established forms, posterieure does not have a defined, independent meaning in standard French.
Etymology and linguistic notes indicate that posterieure appears to resemble the French family of words built
Usage and interpretation: when posterieure is encountered, the most prudent interpretation is that the writer intended
See also: posterior, postérieur, postérieure, anatomical terminology.