Language acquisition in which children are learning to talk (either vocally or manually) at a late time of life or at a much slower rate than other children.
"The most serious issue in the Deaf community is language deprivation among Deaf children, which is caused by the refusal of teachers, administrators, audiologists, and other "experts" to recognize the crucial importance of American Sign Language to our linguistic, cognitive, academic, and social health." -- Matthew S. Moore, 2016.
Review 101 words. Refresher.