paraventricular nucleus

noun
para·​ven·​tric·​u·​lar nucleus | \-ven-ˈtrik-yə-lər-, -vən- \

Medical Definition of paraventricular nucleus 

: a discrete band of neurons in the anterior part of the hypothalamus that produce vasopressin and especially oxytocin and that innervate the neurohypophysis

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