precocious

adjectives

characterized by or characteristic of exceptionally early development or maturity (especially in mental aptitude)
"a precocious child"; "a precocious achievement"
is derived from
is derived from
antonym
is similar to
farther along in physical or mental development
"the child's skeletal age was classified as `advanced'"; "children in the advanced classes in elementary school read far above grade average"
see also
having the capacity for thought and reason especially to a high degree
"is there intelligent life in the universe?"; "an intelligent question"
appearing or developing early
"precocious flowers appear before the leaves as in some species of magnolias"
is similar to
being or occurring at an early stage of development
"in an early stage"; "early forms of life"; "early man"; "an early computer"
domain category
the branch of biology that studies plants