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
  2. control consisting of a mechanical device for controlling the flow of a fluid
  3. device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
  4. Valvular.
  5. A door; especially, one of a pair of folding doors, or one of the leaves of such a door.
  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.
  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.
  8. One of the pieces into which a capsule naturally separates when it bursts.
  9. One of the two similar portions of the shell of a diatom.
  10. A small portion of certain anthers, which opens like a trapdoor to allow the pollen to escape, as in the barberry.
  11. One of the pieces or divisions of bivalve or multivalve shells.
  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.
  13. 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.
  14. One of the leaves of a folding- door; a lid or cover opening only one way; one of the pieces forming a shell.
  15. An arrangement that permits the flow of a fluid in one direction, and closes against its return.
  16. One of a pair of folding doors.
  17. Valved.
  18. 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.
  19. 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.
  20. 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.

Usage examples for valve

  1. Then he struggled with the valve until it was closed. – The Pygmy Planet by John Stewart Williamson
  2. The face for the steam- chest seat and the steam- chest cover may then be prepared by filing, scraping, or grinding, as may be required, and simultaneously the valve seat and valve face may be fitted. – Modern Machine-Shop Practice, Volumes I and II by Joshua Rose
  3. I turned on the switch, opened the needle valve, swung the throttle over to the notch numbered with a big " 2." I placed the crank on the wheel and gave it a vigorous turn. – The River and I by John G. Neihardt
  4. " Now," said Jonas, " I will stop up the nose, and the valve will close itself; and then you will find that you cannot bring the sides together again." – Rollo's Philosophy. [Air] by Jacob Abbott
  5. Instantly Knight pulled the throttle valve open, and the locomotive started forward with a jerk. – Stories Of Georgia 1896 by Joel Chandler Harris
  6. The valve is composed of two portions, a cup and a lip. – Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 2 (of 2) by George Grey
  7. 19. Kroller settled down like a dead man, and on the next instant I shut off the steam and opened the valve. – McGuffey's Fifth Eclectic Reader by William Holmes McGuffey
  8. They were discussing the escape- valve in a diver's helmet, and arguing whether it pays to stiffen the spring for very deep diving. – Careers of Danger and Daring by Cleveland Moffett
  9. She may have been only a safety valve. – Mr. Waddington of Wyck by May Sinclair
  10. Mr. C. ordered the man to let down the valve, but he became confused, and instead of letting go the string which lifted the valve, he pulled on it the more. – The Anti-Slavery Examiner, Omnibus by American Anti-Slavery Society
  11. To tell the truth, this being the first time he had really tried the Sky- Bird in a flight, Paul was nervous as he turned the valve, removed his hands from the graceful little plane, and straightened up. – Around the World in Ten Days by Chelsea Curtis Fraser
  12. The opening of that inner valve meant we were letting horror in. – Stamped Caution by Raymond Zinke Gallun
  13. The upper portion is filled first, where the contents introduced are allowed to remain ten or fifteen minutes, after which the valve is opened and the whole falls into the lower kettle, where it is kept till wanted. – Lectures on Popular and Scientific Subjects by John Sutherland Sinclair, Earl of Caithness
  14. The valve should then be closed. – Boys' Book of Model Boats by Raymond Francis Yates
  15. I did not know then how like he and I were, or how like my fate might have been to his, if, instead of finding at once a fit food for my fancy, and a safety- valve for its excess, in those old romances, I had had my regards turned inwards upon myself, before I could understand the phenomena there exhibited. – Wilfrid Cumbermede by George MacDonald
  16. " By golly, things is getting pretty raw around this camp," he growled, by way of lifting the safety- valve of his anger. – The Happy Family by Bertha Muzzy Bower
  17. The boiler stop valve should be opened very slowly until it is fully opened. – Steam, Its Generation and Use by Babcock & Wilcox Co.
  18. To the end, however, he loved a tete- a- tete with a sympathetic listener- one, it must be conceded, who would be content, except for the occasional comment, to remain himself in the background, as the great man wanted a safety- valve for his own impetuous thoughts, and did not generally care to hear the paler, less interesting impressions of his companion. – Honore de Balzac, His Life and Writings by Mary F. Sandars