rf

(noun) a substance produced by the hypothalamus that is capable of accelerating the secretion of a given hormone by the anterior pituitary gland. Synonyms: releasing factor, releasing hormone, RF.

(noun) a radioactive transuranic element which has been synthesized. Synonyms: rutherfordium, Rf, unnilquadium, Unq, element 104, atomic number 104.

(noun) 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. Synonyms: reticular formation, RF.