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Diaphragm vs Orifice - What's the difference?

diaphragm | orifice |

As nouns the difference between diaphragm and orifice

is that diaphragm is (anatomy) in mammals, a sheet of muscle separating the thorax from the abdomen, contracted and relaxed in respiration to draw air into and expel air from the lungs; also called thoracic diaphragm while orifice is a mouth or aperture, as of a tube, pipe, etc; an opening; as,.

As a verb diaphragm

is (optics|photography) to reduce lens aperture using an optical diaphragm.

diaphragm

English

Noun

(en noun)
  • (anatomy) In mammals, a sheet of muscle separating the thorax from the abdomen, contracted and relaxed in respiration to draw air into and expel air from the lungs; also called thoracic diaphragm.
  • (anatomy) Any of various membranes or sheets of muscle or ligament which separate one cavity from another.
  • A contraceptive device consisting of a flexible cup, used to cover the cervix during intercourse.
  • (mechanics) A flexible membrane separating two chambers and fixed around its periphery that distends into one or other chamber as the difference in the pressure in the chambers varies.
  • (acoustics) In a speaker, the thin, semi-rigid membrane which vibrates to produce sound.
  • (optics, photography) A thin opaque structure with a central aperture, used to limit the passage of light into a camera or similar device.
  • (chemistry) A permeable or semipermeable membrane
  • * {{quote-book, 1921, Wilder Dwight Bancroft, Applied Colloid Chemistry: General Theory citation
    • , passage=The mass of liquid transported through a porous diaphragm in a given time is directly proportional to the current. }}
  • (construction) A floor slab, metal wall panel, roof panel or the like, havig a sufficiently large in-plane shear stiffness and sufficient strength to transmit horizontal forces to resisting systems.
    • Image:Diaphragm.jpg, The thoracic diaphragm . Image:Contraception diaphragme.jpg, A contraceptive diaphragm . Image:Seal (diaphragm).png, A mechanical diaphragm . Image:X5 Paper Pulp Cone.jpg, An acoustic diaphragm .

    Derived terms

    (Derived terms) * diaphragmal * diaphragmic * diaphragmatic * diaphragmatically * interdiaphragm * diaphragm arch * diaphragm pump * diaphragm seal * diaphragm shutter * diaphragm valve * iris diaphragm

    Verb

    (en verb)
  • (optics, photography) To reduce lens aperture using an optical diaphragm.
  • * {{quote-book, 1870, D. Appleton & Co., Appletons' Annual Cyclopædia and Register of Important Events of the Year 1869 citation
    • , passage=He employs an equatorial with an object-glass having a focal length of five metres, and which was diaphragmed down to eight centimetres.}}
  • To act as a diaphragm, for example by vibrating.
  • * {{quote-book, 1996, Tom Drozda et al., Tool and Manufacturing Engineers Handbook, vol. VIII: Plastic Part Manufacturing citation
    • , passage=The holes and burning are caused by the part diaphragming at 20000-40000 cycles/second.}}

    orifice

    English

    Noun

    (en noun)
  • A mouth or aperture, as of a tube, pipe, etc.; an opening; as,
  • * the orifice of an artery or vein
  • * the orifice of a wound