posterior

adj

1. Nearer the rear or hind end; nearer the caudal end of the body in quadrupeds or the dorsal end in bipeds.
2. Nearer the rear or hind end; nearer the caudal end of the body in quadrupeds or the dorsal end in bipeds.
3. (formal)Following in order or in time.

noun

1. (euphemistic, humorous, sometimes)The posterior portions of the human body; especially, the buttocks.

   “Stephen reigned from 1135-1154, that nasty period of our history dubbed 'The Anarchy', when forces loyal to Stephen contested the throne with those of Henry I's daughter Matilda, who by rights should have been queen. Stephen, her cousin, plonked his own posterior on the throne.”

2. The probability that a hypothesis is true (calculated by Bayes' theorem).