noun: (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
noun: a mechanical device in a camera that controls size of aperture of the lens ("The new cameras adjust the diaphragm automatically")
noun: electro-acoustic transducer that vibrates to receive or produce sound waves
noun: a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic; it is filled with spermicide and fitted over the uterine cervix

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"It [laughter] is a ripple effect experienced in all living things of higher species capable of certain judgments or perceptions. It eliminates stress. The 'ripple effect' is felt over the diaphragm which guards the heart and nervous system." [Christ Returns - Speaks His Truth, Letter 9, page 14]

"A spontaneous and hearty burst of laughter is first experienced as a rush of rippling consciousness through the head, bringing a lightening of the entire consciousness. This is immediately followed by the physical 'ripple effect' of laughter, experienced as a light beating of breath on the diaphragm to break up any tension and to smooth away any residue of bitterness." [Christ Returns - Speaks His Truth, Letter 9, page 14]