title: On the meaning of 'language delay'.
mesh_terms: D000367:Age Factors; D002675:Child, Preschool; D006801:Humans; D007805:Language Development Disorders / Q000503:physiopathology*; D007806:Language Disorders / Q000503:physiopathology*; D007807:Language Tests / Q000379:methods; D008037:Linguistics; D008297:Male; D008954:Models, Biological