Source : WordNet®

releasing hormone
     n 1: a substance produced by the hypothalamus that is capable of
          accelerating the secretion of a given hormone by the
          anterior pituitary gland [syn: {releasing factor}, {RF}]
     2: any of several hormones produced in the hypothalamus and
        carried by a vein to the anterior pituitary gland where
        they stimulate the release of anterior pituitary hormones;
        each releasing hormone causes the anterior pituitary to
        secrete a specific hormone [syn: {RH}, {releasing factor},
         {hypothalamic releasing hormone}, {hypothalamic releasing
        factor}]