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Definitions of valve

  1. a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it Scrapingweb Dictionary DB
  2. control consisting of a mechanical device for controlling the flow of a fluid Scrapingweb Dictionary DB
  3. device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone Scrapingweb Dictionary DB
  4. Valvular. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  5. A door; especially, one of a pair of folding doors, or one of the leaves of such a door. Webster Dictionary DB
  6. A lid, plug, or cover, applied to an aperture so that by its movement, as by swinging, lifting and falling, sliding, turning, or the like, it will open or close the aperture to permit or prevent passage, as of a fluid. Webster Dictionary DB
  7. One or more membranous partitions, flaps, or folds, which permit the passage of the contents of a vessel or cavity in one direction, but stop or retard the flow in the opposite direction; as, the ileocolic, mitral, and semilunar valves. Webster Dictionary DB
  8. One of the pieces into which a capsule naturally separates when it bursts. Webster Dictionary DB
  9. One of the two similar portions of the shell of a diatom. Webster Dictionary DB
  10. A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, as in the barberry. Webster Dictionary DB
  11. One of the pieces or divisions of bivalve or multivalve shells. Webster Dictionary DB
  12. A door; especially, one of a pair of folding doors; a mechanism for opening and closing a passage, and thus regulating or directing the movement through it of gas, liquid, etc.; as, a valve in a steam radiator; in the body, a structure which opens and shuts to allow a fluid to flow through the opening in one direction only; as, the valves of the heart; one of the halves, hinged together so as to open and shut, of the shell of a mollusk of the bivalve class, such as the oyster. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  13. Valvula. 1. A fold of the lining membrane of a canal or other hollow organ serving to retard or prevent a reflux of fluid. 2. Any reduplication of tissue or flap-like structure rerembling a valve. See also valvula and plica. A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
  14. Membranous sheet closing canal one way but allowing passage in opposite direction. Warner's pocket medical dictionary of today. By William R. Warner. Published 1898.
  15. One of the leaves of a folding-door: a cover to an aperture which opens in one direction and not in the other: one of the pieces or divisions which form a shell. The american dictionary of the english language. By Daniel Lyons. Published 1899.
  16. One of the leaves of a folding-door; a lid or cover opening only one way; one of the pieces forming a shell. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.
  17. An arrangement that permits the flow of a fluid in one direction, and closes against its return. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  18. One of a pair of folding doors. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  19. Valved. The Concise Standard Dictionary of the English Language. By James Champlin Fernald. Published 1919.
  20. The leaf of a folding-door; a lid or cover to an aperture, so formed as to open a communication in one direction and close it in the other; one of the pieces into which a pericarp naturally separates when it bursts; one of the divisions of a shell. Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914.
  21. Anything that opens over the mouth of a vessel; a cover or lid opening in one direction and shutting in another; in bot., one of the pieces into which a pericarp or fruit separates, when separating naturally. Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
  22. Any of the various structures which permit flow in one direction, but are capable of closing the tube or vessel and preventing the backward flow; any of the pieces formed by a capsule on dehiscence; the lid-like structure of certain anthers; one of the pieces forming the shell of a Diatom; any of the pieces which form the shell in certain Molluscs, Barnacles, etc.; one of the pieces forming the sheath of the ovipositor in certain Insects. A dictionary of scientific terms. By Henderson, I. F.; Henderson, W. D. Published 1920.
  23. [Latin] Any of the various structures which permit flow in one direction, but are capable of closing the tube or vessel and preventing the backward flow (anat.); any of the pieces formed by a capsule on dehiscence; the lid-like structure of certain anthers; one of the pieces forming the shell of a Diatom (bot.); any of the pieces which form the shell in certain Molluscs, Barnacles, etc.; one of the pieces forming the sheath of the ovipositor in certain Insects (zool.). na
  24. Electromechanical or mechanical device that controls the flow of liquid, gas, slurry, dry loose material. 3 maintypes.1. Isolation, 2. Switching, 3, Control. thelawdictionary.org
  25. valv, n. one of the leaves of a folding-door: a cover to an aperture which opens in one direction and not in the other: one of the pieces or divisions forming a shell: (anat.) a membraneous fold resembling a valve or serving as a valve in connection with the flow of blood, lymph, or other fluid--also VAL'VA.--adjs. VAL'VAL, pertaining to a valve; VAL'V[=A]TE, having or resembling a valve or valves: (bot.) meeting at the edges without overlapping, as the petals of flowers; VALVED, having or composed of valves.--ns. VALVE'-GEAR, the mechanism for working a valve; VALVE'LET, VAL'V[=U]LA, VAL'V[=U]LE, a little valve: (bot.) formerly used of the pieces which compose the outer covering of a pericarp.--adj. VAL'V[=U]LAR.--n. VALV[=U]L[=I]'TIS, inflammation of one of the valves of the heart. [Fr.,--L. valva, a folding-door.] gutenberg.org/ebooks/37683
  26. [Latin] An appliance exiting in the course of a channel filled with liquid, so disposed as to allow the flow of the liquid to take place in one direction only. V’s consisting of pouch-like processes of the inner coat are found in the veins, and allow the flow of blood to take place only toward the heart. The V’s of the heart comprise the Mitral v., which prevents regurgitation from the left ventricle into the left auricle; the Tricuspid v., preventing regurgitation from the right ventricle into the right auricle; the Aortic semilunar and the Pulmonic semilunar, preventing regurgitation from the aorta or the pulmonary artery into the left and right ventricles; and in the right auricle the Coronary v. (V. of Thebesius), preventing regurgitation into the coronary sinus, and the Eustachian v., which, in the fetus, directs the blood from the inferior vena cava into the foramen ovale. V’s are also found in the lymphatics and the thoracic duct. Hasner’s v., a fold of mucous membrane at the lower orifice of the nasal duct; not a true v. Ileo-caecal v. (V. of Bauhin), a double fold of mucous membrane at the junction of the ileum and caecum. Kerkring’s v’s, the valvulae conniventes. V. of Vieus-sens, a sheet of nervous substance roofing over the anterior portion of the fourth ventricle of the brain. na
  27. Kinds of automatic or other device for controlling passage of liquid or gas or the like through pipe &c., as clack, rotary, screw, sliding, throttle, v., key v. (of organ, flute, &c.), SAFETY-v.; (Anat., Zool.) membranous part of organ &c. allowing flow of blood &c. in one direction& not in another, as vv. of the heart, veins, pulmonary vv., whence valvulitis n.; (Conch.), each of two or more separable pieces of which shell consists, whole shell in one piece; (Bot.) each of the segments into which a capsule dehisces, each half of an anther after its opening; (now rare) leaf of folding door. Hence or cogn. valval (bot.) valvar, valvate (anat., bot.), (-) valved, valveless, valviferous, valviform, valvular aa., valvelet, valvule (anat., bot.), nn. [French] Concise Oxford Dictionary
  28. A fold in a canal or passage which prevents reflux of its contents. American pocket medical dictionary.
  29. A movable flap or fold which acts to close a passage or orifice more or less completely. Appleton's medical dictionary.
  30. [L.] (Anat.) A membrane opening to admit the passage of blood, and closing to prevent its reflux. Valvular, consisting of, pertaining to, valves. Glossary of terms and phrases - Percy
  31. [L.] (Bot.) One of the divisions of any dehiscent body. Glossary of terms and phrases - Percy
  32. n. [Latin] A folding door, or one of the leaves of such a door;—in mechanics , a lid or covering to an aperture, orifice, or tube, so formed as to open a communication in one direction, and close it in the other by lifting, turning, or sliding; — in anatomy, a membrane which opens in certain vessels to admit the blood, and closes to prevent its regress ; —in botany, the outer coat or covering of a capsule or other pericarp in conchology, the shell—classed as univalve, when formed of one piece, bivalve, when formed of two, and multivalve, when formed of more titan two pieces. Cabinet Dictionary

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