Pneumatic action
Pneumatic Pneu*mat"ic, Pneumatical Pneu*mat"ic*al, a. [L. pneumaticus, Gr. ?, fr. ?, ?, wind, air, ? to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. {Pneumonia}.] 1. 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. --Bacon. [1913 Webster]

2. Of or pertaining to air, or to elastic fluids or their properties; pertaining to pneumatics; as, pneumatic experiments. ``Pneumatical discoveries.'' --Stewart. [1913 Webster]

3. Moved or worked by pressure or flow of air; as, a pneumatic instrument; a pneumatic engine. [1913 Webster]

4. (Biol.) Fitted to contain air; Having cavities filled with air; as, pneumatic cells; pneumatic bones. [1913 Webster]

5. 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. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • pneumatic action — noun : an action employing compressed air and collapsible bellows for connecting and manipulating the movable parts of a pipe organ …   Useful english dictionary

  • Electro-pneumatic action — The electro pneumatic action is a control system for pipe organs, whereby air pressure, controlled by an electric current and operated by the keys of an organ console, opens and closes valves within wind chests, allowing the pipes to speak. This… …   Wikipedia

  • tubular-pneumatic action — noun : an action in a pipe organ in which the opening and closing of the mouth of the pipe is controlled by air pressure regulated by the depressing and releasing of the key …   Useful english dictionary

  • Pneumatic — Pneu*mat ic, Pneumatical Pneu*mat ic*al, a. [L. pneumaticus, Gr. ?, fr. ?, ?, wind, air, ? to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. {Pneumonia}.] 1. Consisting of, or resembling, air; having the properties of an elastic fluid;… …   The Collaborative International Dictionary of English

  • Pneumatic dispatch — Pneumatic Pneu*mat ic, Pneumatical Pneu*mat ic*al, a. [L. pneumaticus, Gr. ?, fr. ?, ?, wind, air, ? to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. {Pneumonia}.] 1. Consisting of, or resembling, air; having the properties of an… …   The Collaborative International Dictionary of English

  • Pneumatic elevator — Pneumatic Pneu*mat ic, Pneumatical Pneu*mat ic*al, a. [L. pneumaticus, Gr. ?, fr. ?, ?, wind, air, ? to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. {Pneumonia}.] 1. Consisting of, or resembling, air; having the properties of an… …   The Collaborative International Dictionary of English

  • Pneumatic lever — Pneumatic Pneu*mat ic, Pneumatical Pneu*mat ic*al, a. [L. pneumaticus, Gr. ?, fr. ?, ?, wind, air, ? to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. {Pneumonia}.] 1. Consisting of, or resembling, air; having the properties of an… …   The Collaborative International Dictionary of English

  • Pneumatic pile — Pneumatic Pneu*mat ic, Pneumatical Pneu*mat ic*al, a. [L. pneumaticus, Gr. ?, fr. ?, ?, wind, air, ? to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. {Pneumonia}.] 1. Consisting of, or resembling, air; having the properties of an… …   The Collaborative International Dictionary of English

  • Pneumatic pump — Pneumatic Pneu*mat ic, Pneumatical Pneu*mat ic*al, a. [L. pneumaticus, Gr. ?, fr. ?, ?, wind, air, ? to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. {Pneumonia}.] 1. Consisting of, or resembling, air; having the properties of an… …   The Collaborative International Dictionary of English

  • Pneumatic railway — Pneumatic Pneu*mat ic, Pneumatical Pneu*mat ic*al, a. [L. pneumaticus, Gr. ?, fr. ?, ?, wind, air, ? to blow, breathe; cf. OHG. fnehan: cf. F. pneumatique. Cf. {Pneumonia}.] 1. Consisting of, or resembling, air; having the properties of an… …   The Collaborative International Dictionary of English

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