mechanical device vs diaphragm

diaphragm vs mechanical device

mechanical device and diaphragm both are nouns.

Word	Noun	Adjective	Verb	Adverb
mechanical device	Yes	No	No	No
diaphragm	Yes	No	No	No

As nouns, diaphragm is a hyponym of mechanical device; that is, diaphragm is a word with a more specific, narrower meaning than mechanical device:

mechanical device: mechanism consisting of a device that works on mechanical principles
diaphragm: a mechanical device in a camera that controls size of aperture of the lens

Other hyponyms of mechanical device include broadcaster, spreader, bumper, bumper guard, carburetor, carburettor, compressor, copyholder, coupler, coupling, crimper, curler, hair curler, roller, stop, dicer, electromechanical device, escapement, gear lever, gearshift, gearstick, shifter, grab, claw, hook, machine, simple machine, pantograph, piston, plunger, propeller, propellor, pump, rachet, ratch, ratchet, auto-changer, changer, record changer, ride, seeder, shutter, binding, ski binding, splicer, splint, sprinkler, stator, stator coil, stoker, stretcher, striker, supply chamber, swing, pickup, pickup arm, tone arm, trap, vibrator, vibrator, voting machine, vane, weather vane, weathervane, wind vane, wheelwork, winder, key, winder, windscreen wiper, windshield wiper, wiper, wiper blade, durometer, page turner.

mechanical device (noun)	diaphragm (noun)
mechanism consisting of a device that works on mechanical principles	a mechanical device in a camera that controls size of aperture of the lens
	electro-acoustic transducer that vibrates to receive or produce sound waves
	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
	(anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration

Difference between mechanical device and diaphragm

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