Synonyms:
diaphragm, stop
Meaning: a mechanical device in a camera that controls size of aperture of the lens; "the new cameras adjust the diaphragm automatically"
Synonyms:
diaphragm, midriff
Meaning: (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
Usage examples
It is well known that the diaphragm of a telephone vibrates with the fluctuations of the current energizing the magnet beneath it.
All the activity of breathing must be centered, not in the throat, but in the middle of the body--you must breathe from the diaphragm.