Source:http://linkedlifedata.com/resource/umls/id/C0023013
MSH: The gradual expansion in complexity and meaning of symbols and sounds as perceived and interpreted by the individual through a maturational and learning process. Stages in development include babbling, cooing, word imitation with cognition, and use of short sentences.,CSP: gradual expansion in complexity and meaning of symbols and sounds as perceived and interpreted by the individual through a maturational and learning process; stages in development include babbling, cooing, word imitation with cognition, and use of short sentences.