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.
girls have always developed earlier than boys on average the onset of puberty happens between the age of 8 and 12 years in girls and between 9 and 14 years in boysirls have always developed earlier than boys on average the onset of puberty happens between the age of 8 and 12 years in girls and between 9 and 14 years in boys