?:definition
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Tract of diencephalon, each instance of which is a part of some hypothalamicohypophysial tract that arises in the paraventricular nucleus of some hypothalamus; some of the fibers end in some infundibulum and others reach some neurohypophysis (posteriorpituitary), where their neurosecretory material is stored as oxytocin before being released into some systemic circulation.
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