pre·co·cious 
(pr
ĭ-k
ōsh
əs)
adj.1. Manifesting or characterized by development, aptitude, or interests considered advanced for a given age: a mathematically precocious child; a child with a precocious wit.
2. Botany Blossoming before the appearance of leaves.
[From Latin praecox, praecoc-, premature, from praecoquere, to boil before, ripen early : prae-, pre- + coquere, to cook, ripen; see pekw- in the Appendix of Indo-European roots.]
pre·cocious·ly adv.
pre·cocity (-kŏsĭ-tē), pre·cocious·ness n.