speech organ

noun
any part of the body, as the tongue, velum, diaphragm, or lungs, that participates, actively or passively, voluntarily or involuntarily, in the production of the sounds of speech.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
Differences in sound systems have a phonological basis: they depend on variation in speech organ positions or breath control.
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