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.
Emeritus Professor Norbert Kluge of the Universitaet UniversitÃ¤t-Koblenz landau wrote in The internet Publication beitraege BeitrÃ¤ge zur Sexualwissenschaft und sexualpaedagogik sexualpÃ¤dagogik that girls in 1992 had their first period on.average at 12 2 years old and in 2010 will have it around 10 or 11. years of agefrican-American girls develop earlier than white girls by 1-1.5 years. The mean age at onset of breast development is 8.87 years for African-American girls and 10.51 years for white girls. The mean age at onset of axillary (armpit) hair growth is 10.8 for A.A. girls and 11.8 for white girls.