Posterior

a.	1.	Later in time; hence, later in the order of proceeding or moving; coming after; - opposed to prior. Hesiod was posterior to Homer. - Broome.
	2.	Situated behind; hinder; - opposed to anterior.
	3.	(Anat.) At or toward the caudal extremity; caudal; - in human anatomy often used for dorsal.
	4.	(Bot.) On the side next the axis of inflorescence; - said of an axillary flower.

Noun	1.	posterior - the fleshy part of the human body that you sit on; "he deserves a good kick in the butt"; "are you going to sit on your fanny and do nothing?" Synonyms: arse, ass, behind, buns, buttocks, hind end, hindquarters, keister, nates, prat, derriere, fanny, rear end, tooshie, tush, seat, fundament, backside, bottom, butt, rump, stern, tail end, tail, rear, can, bum
	2.	posterior - a tooth situated at the back of the mouth Synonyms: back tooth
Adj.	1.	posterior - at or near the hind end in quadrupeds or toward the spine in primates Antonyms: anterior - of or near the head end or toward the front plane of the body

aft, after, aftermost, afterpart, afterpiece, appendant, arse, ass, attendant, back, back door, back seat, back side, backside, backward, behind, bottom, breech, bum, butt, buttocks, cadet, consecutive, consequent, croup, crupper, derriere, ensuing, flack, following, haunches, heel, hind, hind end, hind part, hinder, hindermost, hindhand, hindhead, hindmost, junior, later, latter, lineal, nates, next, occiput, postern, postpositional, postpositive, proximate, puisne, rear, rear end, rearmost, rearward, retral, retrograde, reverse, rump, seat, sequacious, sequent, sequential, stern, subsequent, succeeding, successive, suffixed, tail, tail end, tailpiece, tuchis, younger