noun, Psychiatry. 1. an inability to speak, due to a physical defect, conscious refusal, or psychogenic inhibition. Origin of mutism.
1 A new study finds girls are developing breasts earlier than ever before; American boys and girls are entering puberty about five years younger than they did in 1920.
Tanner stage five: Final Adult Height and Body. 1  This final stage usually occurs at just over 14 years of age. 2  Girls will stop growing about 1-2 years after menstruation begins, reaching their full adult height by age 14-15. 3  Breasts and genitals are fully developed at the end of this stage.nce their period starts, girls typically gain another 1 to 2 inches in height, reaching their full adult height by age 14 or 15. However there is a very broad range of time in which girls hit puberty-related growth spurts.