Decaffeinated coffee comes from a chemical process that takes out caffeine from the beans. Pharmaceutical and soda companies buy the extracted caffeine.
DIAPHRAGM
diaphragm, stop
(noun) a mechanical device in a camera that controls size of aperture of the lens; “the new cameras adjust the diaphragm automatically”
diaphragm
(noun) electro-acoustic transducer that vibrates to receive or produce sound waves
diaphragm, pessary, contraceptive diaphragm
(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
diaphragm, midriff
(noun) (anatomy) a muscular partition separating the abdominal and thoracic cavities; functions in respiration
Source: WordNet® 3.1
Etymology
Noun
diaphragm (plural diaphragms)
(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.
(construction) A floor slab, metal wall panel, roof panel or the like, having a sufficiently large in-plane shear stiffness and sufficient strength to transmit horizontal forces to resisting systems.
Verb
diaphragm (third-person singular simple present diaphragms, present participle diaphragming, simple past and past participle diaphragmed)
(optics, photography) To reduce lens aperture using an optical diaphragm.
To act as a diaphragm, for example by vibrating.
Source: Wiktionary
Di"a*phragm, n. Etym: [L. diaphragma, Gr. fareire to stuff: cf. F. diaphragme. See Farce.]
1. A dividing membrane or thin partition, commonly with an opening through it.
2. (Anat.)
Definition: The muscular and tendinous partition separating the cavity of the chest from that of the abdomen; the midriff.
3. (Zoöl.)
Definition: A calcareous plate which divides the cavity of certain shells into two parts.
4. (Opt.)
Definition: A plate with an opening, which is generally circular, used in instruments to cut off marginal portions of a beam of light, as at the focus of a telescope.
5. (Mach.)
Definition: A partition in any compartment, for various purposes. Diaphragm pump, one in which a flexible diaphragm takes the place of a piston.
Source: Webster’s Unabridged Dictionary 1913 Edition
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