Precocious :: Precocious (a.) Ripe or mature before the proper or natural time; early or prematurely ripe or developed; as, precocious trees..
Precocious :: Precocious (a.) Developed more than is natural or usual at a given age; exceeding what is to be expected of one's years; too forward; -- used especially of mental forwardness; as, a precocious child; precocious talents..
Precocity :: Precocity (n.) The quality or state of being precocious; untimely ripeness; premature development, especially of the mental powers; forwardness..