Definition of Precocious puberty Precocious puberty: The onset of secondary sexual characteristics, such as breast buds in girls, growth of the penis and thinning of the scrotum in boys, and the appearance of pubic hair in both sexes, before the normal age of puberty.
Precocious puberty: The onset of secondary sexual characteristics, such as breast buds in girls, growth of the penis and thinning of the scrotum in boys, and the appearance of pubic hair in both sexes, before the normal age of puberty.