posterior

definition: coming at a subsequent time or stage
example:
speech part: adjective
synonyms: later
definition: located at or near or behind a part or near the end of a structure
example:
speech part: adjective
synonyms:
definition: a tooth situated at the back of the mouth
example:
speech part: noun
synonyms: back tooth
definition: the fleshy part of the human body that you sit on
example:
speech part: noun
synonyms: tail

How posterior is being used?