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- 1chiefly Anatomy further back in position; of or nearer the rear or hind end, especially of the body or a part of it:the posterior part of the gut a basal body situated just posterior to the nucleusThe opposite of anterior.
- Medicine relating to or denoting presentation of a fetus in which the rear or caudal end is nearest the cervix and emerges first at birth:a posterior laborCompare with breech birth.
Pronunciation: /päˌsti(ə)rēˈôritē, pō-/noun
early 16th century (as a plural noun denoting descendants): from Latin, comparative of posterus 'following', from post 'after'