Meaning of “diaphragm” in the English Dictionary

"diaphragm" in American English

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diaphragmnoun [ C ]

us /ˈdɑɪ·əˌfræm/

a thin piece of material that is stretched across an opening, esp. the muscle that separates the chest from the lower part of the body containing the stomach and bowels

(Definition of “diaphragm” from the Cambridge Academic Content Dictionary © Cambridge University Press)