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3 definitions found
 for Air spring
From The Collaborative International Dictionary of English v.0.48 :

  Spring \Spring\, n. [AS. spring a fountain, a leap. See
     Spring, v. i.]
     1. A leap; a bound; a jump.
        [1913 Webster]
              The prisoner, with a spring, from prison broke.
        [1913 Webster]
     2. A flying back; the resilience of a body recovering its
        former state by its elasticity; as, the spring of a bow.
        [1913 Webster]
     3. Elastic power or force.
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              Heavens! what a spring was in his arm! --Dryden.
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     4. An elastic body of any kind, as steel, India rubber, tough
        wood, or compressed air, used for various mechanical
        purposes, as receiving and imparting power, diminishing
        concussion, regulating motion, measuring weight or other
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     Note: The principal varieties of springs used in mechanisms
           are the spiral spring (Fig. a), the coil spring
           (Fig. b), the elliptic spring (Fig. c), the
           half-elliptic spring (Fig. d), the volute spring,
           the India-rubber spring, the atmospheric spring,
           [1913 Webster]
     5. Any source of supply; especially, the source from which a
        stream proceeds; an issue of water from the earth; a
        natural fountain. "All my springs are in thee." --Ps.
        lxxxvii. 7. "A secret spring of spiritual joy." --Bentley.
        "The sacred spring whence right and honor streams." --Sir
        J. Davies.
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     6. Any active power; that by which action, or motion, is
        produced or propagated; cause; origin; motive.
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              Our author shuns by vulgar springs to move
              The hero's glory, or the virgin's love. --Pope.
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     7. That which springs, or is originated, from a source; as:
        (a) A race; lineage. [Obs.] --Chapman.
        (b) A youth; a springal. [Obs.] --Spenser.
        (c) A shoot; a plant; a young tree; also, a grove of
            trees; woodland. [Obs.] --Spenser. Milton.
            [1913 Webster]
     8. That which causes one to spring; specifically, a lively
        tune. [Obs.] --Beau. & Fl.
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     9. The season of the year when plants begin to vegetate and
        grow; the vernal season, usually comprehending the months
        of March, April, and May, in the middle latitudes north of
        the equator. "The green lap of the new-come spring."
        [1913 Webster]
     Note: Spring of the astronomical year begins with the vernal
           equinox, about March 21st, and ends with the summer
           solstice, about June 21st.
           [1913 Webster]
     10. The time of growth and progress; early portion; first
         stage; as, the spring of life. "The spring of the day."
         --1 Sam. ix. 26.
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               O how this spring of love resembleth
               The uncertain glory of an April day. --Shak.
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     11. (Naut.)
         (a) A crack or fissure in a mast or yard, running
             obliquely or transversely.
         (b) A line led from a vessel's quarter to her cable so
             that by tightening or slacking it she can be made to
             lie in any desired position; a line led diagonally
             from the bow or stern of a vessel to some point upon
             the wharf to which she is moored.
             [1913 Webster]
     Air spring, Boiling spring, etc. See under Air,
        Boiling, etc.
     Spring back (Bookbinding), a back with a curved piece of
        thin sheet iron or of stiff pasteboard fastened to the
        inside, the effect of which is to make the leaves of a
        book thus bound (as a ledger or other account or blank
        book) spring up and lie flat.
     Spring balance, a contrivance for measuring weight or force
        by the elasticity of a spiral spring of steel.
     Spring beam, a beam that supports the side of a paddle box.
        See Paddle beam, under Paddle, n.
     Spring beauty.
         (a) (Bot.) Any plant of the genus Claytonia, delicate
             herbs with somewhat fleshy leaves and pretty
             blossoms, appearing in springtime.
         (b) (Zool.) A small, elegant American butterfly ({Erora
             laeta) which appears in spring. The hind wings of
             the male are brown, bordered with deep blue; those of
             the female are mostly blue.
     Spring bed, a mattress, under bed, or bed bottom, in which
        springs, as of metal, are employed to give the required
     Spring beetle (Zool.), a snapping beetle; an elater.
     Spring box, the box or barrel in a watch, or other piece of
        mechanism, in which the spring is contained.
     Spring fly (Zool.), a caddice fly; -- so called because it
        appears in the spring.
     Spring grass (Bot.), vernal grass. See under Vernal.
     Spring gun, a firearm discharged by a spring, when this is
        trodden upon or is otherwise moved.
     Spring hook (Locomotive Engines), one of the hooks which
        fix the driving-wheel spring to the frame.
     Spring latch, a latch that fastens with a spring.
     Spring lock, a lock that fastens with a spring.
     Spring mattress, a spring bed.
     Spring of an arch (Arch.) See Springing line of an arch,
        under Springing.
     Spring of pork, the lower part of a fore quarter, which is
        divided from the neck, and has the leg and foot without
        the shoulder. [Obs.] --Nares.
              Sir, pray hand the spring of pork to me. --Gayton.
     Spring pin (Locomotive Engines), an iron rod fitted between
        the springs and the axle boxes, to sustain and regulate
        the pressure on the axles.
     Spring rye, a kind of rye sown in the spring; -- in
        distinction from winter rye, sown in autumn.
     Spring stay (Naut.), a preventer stay, to assist the
        regular one. --R. H. Dana, Jr.
     Spring tide, the tide which happens at, or soon after, the
        new and the full moon, and which rises higher than common
        tides. See Tide.
     Spring wagon, a wagon in which springs are interposed
        between the body and the axles to form elastic supports.
     Spring wheat, any kind of wheat sown in the spring; -- in
        distinction from winter wheat, which is sown in autumn.
        [1913 Webster] Springald

From The Collaborative International Dictionary of English v.0.48 :

  Air \Air\ ([^a]r), n. [OE. air, eir, F. air, L. a["e]r, fr. Gr.
     'ah`r, air, mist, for 'a[digamma]hr, fr. root 'a[digamma] to
     blow, breathe, probably akin to E. wind. In sense 10 the
     French has taking a meaning fr. It. aria atmosphere, air, fr.
     the same Latin word; and in senses 11, 12, 13 the French
     meaning is either fr. L. aria, or due to confusion with F.
     aire, in an older sense of origin, descent. Cf. A["e]ry,
     Debonair, Malaria, Wind.]
     1. The fluid which we breathe, and which surrounds the earth;
        the atmosphere. It is invisible, inodorous, insipid,
        transparent, compressible, elastic, and ponderable.
        [1913 Webster]
     Note: By the ancient philosophers, air was regarded as an
           element; but modern science has shown that it is
           essentially a mixture of oxygen and nitrogen, with a
           small amount of carbon dioxide, the average proportions
           being, by volume: oxygen, 20.96 per cent.; nitrogen,
           79.00 per cent.; carbon dioxide, 0.04 per cent. These
           proportions are subject to a very slight variability.
           Air also always contains some vapor of water.
           [1913 Webster]
     2. Symbolically: Something unsubstantial, light, or volatile.
        "Charm ache with air." --Shak.
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              He was still all air and fire. [Air and fire being
        the finer and quicker elements as opposed to earth and
        water.]                                     --Macaulay
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     3. A particular state of the atmosphere, as respects heat,
        cold, moisture, etc., or as affecting the sensations; as,
        a smoky air, a damp air, the morning air, etc.
        [1913 Webster]
     4. Any a["e]riform body; a gas; as, oxygen was formerly
        called vital air. [Obs.]
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     5. Air in motion; a light breeze; a gentle wind.
        [1913 Webster]
              Let vernal airs through trembling osiers play.
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     6. Odoriferous or contaminated air.
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     7. That which surrounds and influences.
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              The keen, the wholesome air of poverty.
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     8. Utterance abroad; publicity; vent.
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              You gave it air before me.            --Dryden.
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     9. Intelligence; information. [Obs.] --Bacon.
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     10. (Mus.)
         (a) A musical idea, or motive, rhythmically developed in
             consecutive single tones, so as to form a symmetrical
             and balanced whole, which may be sung by a single
             voice to the stanzas of a hymn or song, or even to
             plain prose, or played upon an instrument; a melody;
             a tune; an aria.
         (b) In harmonized chorals, psalmody, part songs, etc.,
             the part which bears the tune or melody -- in modern
             harmony usually the upper part -- is sometimes called
             the air.
             [1913 Webster]
     11. The peculiar look, appearance, and bearing of a person;
         mien; demeanor; as, the air of a youth; a heavy air; a
         lofty air. "His very air." --Shak.
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     12. Peculiar appearance; apparent character; semblance;
         manner; style.
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               It was communicated with the air of a secret.
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     12. pl. An artificial or affected manner; show of pride or
         vanity; haughtiness; as, it is said of a person, he puts
         on airs. --Thackeray.
         [1913 Webster]
     14. (Paint.)
         (a) The representation or reproduction of the effect of
             the atmospheric medium through which every object in
             nature is viewed. --New Am. Cyc.
         (b) Carriage; attitude; action; movement; as, the head of
             that portrait has a good air. --Fairholt.
             [1913 Webster]
     15. (Man.) The artificial motion or carriage of a horse.
         [1913 Webster]
     Note: Air is much used adjectively or as the first part of a
           compound term. In most cases it might be written
           indifferently, as a separate limiting word, or as the
           first element of the compound term, with or without the
           hyphen; as, air bladder, air-bladder, or airbladder;
           air cell, air-cell, or aircell; air-pump, or airpump.
           [1913 Webster]
     Air balloon. See Balloon.
     Air bath.
         (a) An apparatus for the application of air to the body.
         (b) An arrangement for drying substances in air of any
             desired temperature.
     Air castle. See Castle in the air, under Castle.
     Air compressor, a machine for compressing air to be used as
        a motive power.
     Air crossing, a passage for air in a mine.
     Air cushion, an air-tight cushion which can be inflated;
        also, a device for arresting motion without shock by
        confined air.
     Air fountain, a contrivance for producing a jet of water by
        the force of compressed air.
     Air furnace, a furnace which depends on a natural draft and
        not on blast.
     Air line, a straight line; a bee line. Hence
     Air-line, adj.; as, air-line road.
     Air lock (Hydr. Engin.), an intermediate chamber between
        the outer air and the compressed-air chamber of a
        pneumatic caisson. --Knight.
     Air port (Nav.), a scuttle or porthole in a ship to admit
     Air spring, a spring in which the elasticity of air is
     Air thermometer, a form of thermometer in which the
        contraction and expansion of air is made to measure
        changes of temperature.
     Air threads, gossamer.
     Air trap, a contrivance for shutting off foul air or gas
        from drains, sewers, etc.; a stench trap.
     Air trunk, a pipe or shaft for conducting foul or heated
        air from a room.
     Air valve, a valve to regulate the admission or egress of
        air; esp. a valve which opens inwardly in a steam boiler
        and allows air to enter.
     Air way, a passage for a current of air; as the air way of
        an air pump; an air way in a mine.
     In the air.
         (a) Prevalent without traceable origin or authority, as
         (b) Not in a fixed or stable position; unsettled.
         (c) (Mil.) Unsupported and liable to be turned or taken
             in flank; as, the army had its wing in the air.
     on the air, currently transmitting; live; -- used of radio
        and television broadcasts, to indicate that the images and
        sounds being picked up by cameras and microphones are
        being broadcast at the present moment.
     Note: In call-in programs where individuals outside a radio
           or television studio have telephoned into the station,
           when their voice is being directly broadcast, the host
           of the program commonly states "You're on the air." as
           a warning that the conversation is not private.
     To take air, to be divulged; to be made public.
     To take the air, to go abroad; to walk or ride out.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  air spring
      n 1: a mechanical device using confined air to absorb the shock
           of motion [syn: air cushion, air spring]

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