Hyper Dictionary

English Dictionary Computer Dictionary Video Dictionary Thesaurus Dream Dictionary Medical Dictionary

Search Dictionary:  

Meaning of VALVE

Pronunciation:  valv

WordNet Dictionary
  1. [n]  control consisting of a mechanical device for controlling the flow of a fluid
  2. [n]  device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
  3. [n]  a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it

VALVE is a 5 letter word that starts with V.


 See Also: accelerator, anatomical structure, ball valve, bodily structure, body structure, brass, butterfly valve, cardiac valve, choke, clack, clack valve, clapper valve, complex body part, control, controller, device, escape, escape cock, escape valve, exhaust valve, handwheel, heart, heart valve, ileocecal valve, intake valve, poppet, poppet valve, pump, relief valve, safety valve, slide valve, structure, throttle, throttle valve, ticker, valvelet, valvula, valvule



Webster's 1913 Dictionary
\Valve\, n. [L. valva the leaf, fold, or valve of a door:
cf. F. valve.]
1. A door; especially, one of a pair of folding doors, or one
   of the leaves of such a door.

         Swift through the valves the visionary fair
         Repassed.                             --Pope.

         Heavily closed, . . . the valves of the barn doors.

2. 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.

Note: A valve may act automatically so as to be opened by the
      effort of a fluid to pass in one direction, and closed
      by the effort to pass in the other direction, as a
      clack valve; or it may be opened or closed by hand or
      by mechanism, as a screw valve, or a slide valve.

3. (Anat.) 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.

4. (Bot.)
   (a) One of the pieces into which a capsule naturally
       separates when it bursts.
   (b) One of the two similar portions of the shell of a
   (c) A small portion of certain anthers, which opens like a
       trapdoor to allow the pollen to escape, as in the

5. (Zo["o]l.) One of the pieces or divisions of bivalve or
   multivalve shells.

{Air valve}, {Ball valve}, {Check valve}, etc. See under
   {Air}. {Ball}, {Check}, etc.

{Double-beat valve}, a kind of balance valve usually
   consisting of a movable, open-ended, turban-shaped shell
   provided with two faces of nearly equal diameters, one
   above another, which rest upon two corresponding seats
   when the valve is closed.

{Equilibrium valve}.
   (a) A balance valve. See under {Balance}.
   (b) A valve for permitting air, steam, water, etc., to
       pass into or out of a chamber so as to establish or
       maintain equal pressure within and without.

{Valve chest} (Mach.), a chamber in which a valve works;
   especially (Steam Engine), the steam chest; -- called in
   England {valve box}, and {valve casing}. See {Steam
   chest}, under {Steam}.

{Valve face} (Mach.), that part of the surface of a valve
   which comes in contact with the {valve seat}.

{Valve gear}, or {Valve motion} (Steam Engine), the system of
   parts by which motion is given to the valve or valves for
   the distribution of steam in the cylinder. For an
   illustration of one form of valve gear, see {Link motion}.

{Valve seat}. (Mach.)
   (a) The fixed surface on which a valve rests or against
       which it presses.
   (b) A part or piece on which such a surface is formed.

{Valve stem} (Mach.), a rod attached to a valve, for moving

{Valve yoke} (Mach.), a strap embracing a slide valve and
   connecting it to the valve stem.

Computing Dictionary

UK term for a vacuum tube.

Medical Dictionary
 Definition: fold in the lining of an organ that prevents fluid from flowing backward.
Biology Dictionary
    1. A device that controls the flow of a fluid through a pipe.
    2. One shell of a double shelled mollusc such as a clam or oyster.
    3. In botany terminology, a portion of an organ that has fragmented; of a capsule, the teeth like portions into which the dehiscing part of the pericarp splits at maturity.
  1. A valve is a membranous fold in a hollow organ to allow fluid to flow in one direction only.