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Related to child-directed speech: motherese
child-di·rect·ed speech(chīld′dĭ-rĕk′tĭd, -dī-)
Any of various speech patterns used by parents or caregivers when communicating with young children, particularly infants, usually involving simplified vocabulary, melodic pitch, repetitive questioning, and a slow or deliberate tempo.
Usage Note: Although motherese popularly describes the language patterns of mothers speaking to their infants, these patterns are not limited to them; therefore, child-language researchers often employ the term child-directed speech to include a wider range of speakers and addressees. Others use caregiver speech, which reflects a still wider range, or, less commonly, parentese.