beam compass

from The Collaborative International Dictionary of English v.0.48
Compass \Com"pass\ (k[u^]m"pas), n. [F. compas, fr. LL.
   compassus circle, prop., a stepping together; com- + passus
   pace, step. See {Pace}, {Pass}.]
   1. A passing round; circuit; circuitous course.
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            They fetched a compass of seven day's journey. --2
                                                  Kings iii. 9.
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            This day I breathed first; time is come round,
            And where I did begin, there shall I end;
            My life is run his compass.           --Shak.
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   2. An inclosing limit; boundary; circumference; as, within
      the compass of an encircling wall.
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   3. An inclosed space; an area; extent.
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            Their wisdom . . . lies in a very narrow compass.
                                                  --Addison.
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   4. Extent; reach; sweep; capacity; sphere; as, the compass of
      his eye; the compass of imagination.
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            The compass of his argument.          --Wordsworth.
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   5. Moderate bounds, limits of truth; moderation; due limits;
      -- used with within.
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            In two hundred years before (I speak within
            compass), no such commission had been executed.
                                                  --Sir J.
                                                  Davies.
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   6. (Mus.) The range of notes, or tones, within the capacity
      of a voice or instrument.
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            You would sound me from my lowest note to the top of
            my compass.                           --Shak.
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   7. An instrument for determining directions upon the earth's
      surface by means of a magnetized bar or needle turning
      freely upon a pivot and pointing in a northerly and
      southerly direction.
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            He that first discovered the use of the compass did
            more for the supplying and increase of useful
            commodities than those who built workhouses.
                                                  --Locke.
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   8. A pair of compasses. [R.] See {Compasses.}

            To fix one foot of their compass wherever they
            please.                               --Swift.
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   9. A circle; a continent. [Obs.]
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            The tryne compas [the threefold world containing
            earth, sea, and heaven. --Skeat.]     --Chaucer.
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   {Azimuth compass}. See under {Azimuth}.

   {Beam compass}. See under {Beam}.

   {Compass card}, the circular card attached to the needles of
      a mariner's compass, on which are marked the thirty-two
      points or rhumbs.

   {Compass dial}, a small pocket compass fitted with a sundial
      to tell the hour of the day.

   {Compass plane} (Carp.), a plane, convex in the direction of
      its length on the under side, for smoothing the concave
      faces of curved woodwork.

   {Compass plant}, {Compass flower} (Bot.), a plant of the
      American prairies ({Silphium laciniatum}), not unlike a
      small sunflower; rosinweed. Its lower and root leaves are
      vertical, and on the prairies are disposed to present
      their edges north and south.
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            Its leaves are turned to the north as true as the
            magnet:
            This is the compass flower.           --Longefellow.

   {Compass saw}, a saw with a narrow blade, which will cut in a
      curve; -- called also {fret saw} and {keyhole saw}.

   {Compass timber} (Shipbuilding), curved or crooked timber.

   {Compass window} (Arch.), a circular bay window or oriel
      window.

   {Mariner's compass}, a kind of compass used in navigation. It
      has two or more magnetic needles permanently attached to a
      card, which moves freely upon a pivot, and is read with
      reference to a mark on the box representing the ship's
      head. The card is divided into thirty-two points, called
      also rhumbs, and the glass-covered box or bowl containing
      it is suspended in gimbals within the binnacle, in order
      to preserve its horizontal position.

   {Surveyor's compass}, an instrument used in surveying for
      measuring horizontal angles. See {Circumferentor}.

   {Variation compass}, a compass of delicate construction, used
      in observations on the variations of the needle.

   {To fetch a compass}, to make a circuit.
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from The Collaborative International Dictionary of English v.0.48
Beam \Beam\ (b[=e]m), n. [AS. be['a]m beam, post, tree, ray of
   light; akin to OFries. b[=a]m tree, OS. b[=o]m, D. boom, OHG.
   boum, poum, G. baum, Icel. ba[eth]mr, Goth. bagms and Gr.
   fy^ma a growth, fy^nai to become, to be. Cf. L. radius staff,
   rod, spoke of a wheel, beam or ray, and G. strahl arrow,
   spoke of a wheel, ray or beam, flash of lightning. [root]97.
   See {Be}; cf. {Boom} a spar.]
   1. Any large piece of timber or iron long in proportion to
      its thickness, and prepared for use.
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   2. One of the principal horizontal timbers of a building or
      ship.
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            The beams of a vessel are strong pieces of timber
            stretching across from side to side to support the
            decks.                                --Totten.
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   3. The width of a vessel; as, one vessel is said to have more
      beam than another.
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   4. The bar of a balance, from the ends of which the scales
      are suspended.
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            The doubtful beam long nods from side to side.
                                                  --Pope.
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   5. The principal stem or horn of a stag or other deer, which
      bears the antlers, or branches.
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   6. The pole of a carriage. [Poetic] --Dryden.
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   7. A cylinder of wood, making part of a loom, on which
      weavers wind the warp before weaving; also, the cylinder
      on which the cloth is rolled, as it is woven; one being
      called the fore beam, the other the back beam.
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   8. The straight part or shank of an anchor.
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   9. The main part of a plow, to which the handles and colter
      are secured, and to the end of which are attached the oxen
      or horses that draw it.
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   10. (Steam Engine) A heavy iron lever having an oscillating
       motion on a central axis, one end of which is connected
       with the piston rod from which it receives motion, and
       the other with the crank of the wheel shaft; -- called
       also {working beam} or {walking beam}.
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   11. A ray or collection of parallel rays emitted from the sun
       or other luminous body; as, a beam of light, or of heat.
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             How far that little candle throws his beams!
                                                  --Shak.
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   12. (Fig.): A ray; a gleam; as, a beam of comfort.
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             Mercy with her genial beam.          --Keble.
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   13. One of the long feathers in the wing of a hawk; -- called
       also {beam feather}.
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   {Abaft the beam} (Naut.), in an arc of the horizon between a
      line that crosses the ship at right angles, or in the
      direction of her beams, and that point of the compass
      toward which her stern is directed.

   {Beam center} (Mach.), the fulcrum or pin on which the
      working beam of an engine vibrates.

   {Beam compass}, an instrument consisting of a rod or beam,
      having sliding sockets that carry steel or pencil points;
      -- used for drawing or describing large circles.

   {Beam engine}, a steam engine having a working beam to
      transmit power, in distinction from one which has its
      piston rod attached directly to the crank of the wheel
      shaft.

   {Before the beam} (Naut.), in an arc of the horizon included
      between a line that crosses the ship at right angles and
      that point of the compass toward which the ship steers.

   {On the beam}, in a line with the beams, or at right angles
      with the keel.

   {On the weather beam}, on the side of a ship which faces the
      wind.

   {To be on her beam ends}, to incline, as a vessel, so much on
      one side that her beams approach a vertical position.
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