RF, n.
a complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone
<noun.body>
RF reticular formation
semantic pointers
part holonym
hypernym
part meronym
a substance produced by the hypothalamus that is capable of accelerating the secretion of a given hormone by the anterior pituitary gland
<noun.substance>
RF releasing factor releasing hormone