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: P- P. P/ P< Pa Pb Pc Pd Pe Pf Ph Pi Pj Pk Pl Pm Pn Po Pp Pr Ps Pt Pu Pv Pw Px Py
plzen | pm | pms | pneometer | pneuma | pneumatic | pneumatic caisson | pneumatic drill | pneumatic hammer | pneumatic tire | pneumatic tyre



Adjective, Noun


     A vehicle, as a bicycle, the wheels of which are fitted with pneumatic tires.  [Webster 1913 Suppl.]
pneumatica. [L. pneumaticus, Gr. , fr. , , wind, air, to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. Pneumonia.].
  •  Consisting of, or resembling, air; having the properties of an elastic fluid; gaseous; opposed to dense or solid.  [1913 Webster]
    "The pneumatical substance being, in some bodies, the native spirit of the body."  [1913 Webster]
  •  Of or pertaining to air, or to elastic fluids or their properties; pertaining to pneumatics; as, pneumatic experiments.  Stewart.  [1913 Webster]
  •  Moved or worked by pressure or flow of air; as, a pneumatic instrument; a pneumatic engine.  [1913 Webster]
  •  Fitted to contain air; Having cavities filled with air; as, pneumatic cells; pneumatic bones.  [1913 Webster]
  •  Adapted for containing compressed air; inflated with air; as, a pneumatic cushion; a pneumatic tire, a tire formed of an annular tube of flexible fabric, as India rubber, suitable for being inflated with air.  [Webster 1913 Suppl.]
Pneumatic action, or Pneumatic lever (Mus.), a contrivance for overcoming the resistance of the keys and other movable parts in an organ, by causing compressed air from the wind chest to move them. -- Pneumatic dispatch, a system of tubes, leading to various points, through which letters, packages, etc., are sent, by the flow and pressure of air. -- Pneumatic elevator, a hoisting machine worked by compressed air. -- Pneumatic pile, a tubular pile or cylinder of large diameter sunk by atmospheric pressure. -- Pneumatic pump, an air-exhausting or forcing pump. -- Pneumatic railway. See Atmospheric railway, under Atmospheric. -- Pneumatic syringe, a stout tube closed at one end, and provided with a piston, for showing that the heat produced by compressing a gas will ignite substances. -- Pneumatic trough, a trough, generally made of wood or sheet metal, having a perforated shelf, and used, when filled with water or mercury, for collecting gases in chemical operations. -- Pneumatic tube. See Pneumatic dispatch, above.


pneumatic, adj. & n.
1 of or relating to air or wind.
2 containing or operated by compressed air.
3 connected with or containing air cavities esp. in the bones of birds or in fish.

pneumatic drill a drill driven by compressed air, for breaking up a hard surface. pneumatic trough a shallow container used in laboratories to collect gases in jars over the surface of water or mercury.
pneumatically adv. pneumaticity n.
F pneumatique or L pneumaticus f. Gk pneumatikos f. pneuma wind f. pneo breathe



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For further exploring for "pneumatic" in Webster Dictionary Online

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