diaphragm

Noun
  1. A mechanical device in a camera that controls size of aperture of the lens (synset 103193767)
    "the new cameras adjust the diaphragm automatically"
    is a type of: mechanical device - mechanism consisting of a device that works on mechanical principles
    subtypes: iris, iris diaphragm - diaphragm consisting of thin overlapping plates that can be adjusted to change the diameter of a central opening
    is a part of: camera, photographic camera - equipment for taking photographs (usually consisting of a lightproof box with a lens at one end and light-sensitive film at the other)
    same as: stop
  2. (anatomy) a muscular partition separating the abdominal and thoracic cavities;
    Functions in respiration (synset 105326156)
    referred to in: anatomy, general anatomy - the branch of morphology that deals with the structure of animals
    is a type of:
    is a part of: body, torso, trunk - the body excluding the head and neck and limbs
    same as: midriff
  3. 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 (synset 103194145)
    is a type of: birth control device, contraceptive, contraceptive device, preventative, preventive, prophylactic device - an agent or device intended to prevent conception
    same as: contraceptive diaphragm, pessary
  4. Electro-acoustic transducer that vibrates to receive or produce sound waves (synset 103193995)
    is a type of: disc, disk - a flat circular plate
    is a part of: electro-acoustic transducer - a transducer that converts electrical to acoustic energy or vice versa

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