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2 definitions found
 for Axis in peritrochio
From The Collaborative International Dictionary of English v.0.48 :

  Wheel \Wheel\ (hw[=e]l), n. [OE. wheel, hweol, AS. hwe['o]l,
     hweogul, hweowol; akin to D. wiel, Icel. hv[=e]l, Gr.
     ky`klos, Skr. cakra; cf. Icel. hj[=o]l, Dan. hiul, Sw. hjul.
     [root]218. Cf. Cycle, Cyclopedia.]
     [1913 Webster]
     1. A circular frame turning about an axis; a rotating disk,
        whether solid, or a frame composed of an outer rim, spokes
        or radii, and a central hub or nave, in which is inserted
        the axle, -- used for supporting and conveying vehicles,
        in machinery, and for various purposes; as, the wheel of a
        wagon, of a locomotive, of a mill, of a watch, etc.
        [1913 Webster]
  
              The gasping charioteer beneath the wheel
              Of his own car.                       --Dryden.
        [1913 Webster]
  
     2. Any instrument having the form of, or chiefly consisting
        of, a wheel. Specifically: 
        [1913 Webster]
        (a) A spinning wheel. See under Spinning.
            [1913 Webster]
        (b) An instrument of torture formerly used.
            [1913 Webster]
  
                  His examination is like that which is made by
                  the rack and wheel.               --Addison.
            [1913 Webster]
  
     Note: This mode of torture is said to have been first
           employed in Germany, in the fourteenth century. The
           criminal was laid on a cart wheel with his legs and
           arms extended, and his limbs in that posture were
           fractured with an iron bar. In France, where its use
           was restricted to the most atrocious crimes, the
           criminal was first laid on a frame of wood in the form
           of a St. Andrew's cross, with grooves cut transversely
           in it above and below the knees and elbows, and the
           executioner struck eight blows with an iron bar, so as
           to break the limbs in those places, sometimes finishing
           by two or three blows on the chest or stomach, which
           usually put an end to the life of the criminal, and
           were hence called coups-de-grace -- blows of mercy. The
           criminal was then unbound, and laid on a small wheel,
           with his face upward, and his arms and legs doubled
           under him, there to expire, if he had survived the
           previous treatment. --Brande.
           [1913 Webster]
        (c) (Naut.) A circular frame having handles on the
            periphery, and an axle which is so connected with the
            tiller as to form a means of controlling the rudder
            for the purpose of steering.
            [1913 Webster]
        (d) (Pottery) A potter's wheel. See under Potter.
            [1913 Webster]
  
                  Then I went down to the potter's house, and,
                  behold, he wrought a work on the wheels. --Jer.
                                                    xviii. 3.
            [1913 Webster]
  
                  Turn, turn, my wheel! This earthen jar
                  A touch can make, a touch can mar. --Longfellow.
            [1913 Webster]
        (e) (Pyrotechny) A firework which, while burning, is
            caused to revolve on an axis by the reaction of the
            escaping gases.
            [1913 Webster]
        (f) (Poetry) The burden or refrain of a song.
            [1913 Webster]
  
     Note: "This meaning has a low degree of authority, but is
           supposed from the context in the few cases where the
           word is found." --Nares.
           [1913 Webster]
  
                 You must sing a-down a-down,
                 An you call him a-down-a.
                 O, how the wheel becomes it!       --Shak.
           [1913 Webster]
           [1913 Webster]
  
     3. A bicycle or a tricycle; a velocipede.
        [1913 Webster]
  
     4. A rolling or revolving body; anything of a circular form;
        a disk; an orb. --Milton.
        [1913 Webster]
  
     5. A turn revolution; rotation; compass.
        [1913 Webster]
  
              According to the common vicissitude and wheel of
              things, the proud and the insolent, after long
              trampling upon others, come at length to be trampled
              upon themselves.                      --South.
        [1913 Webster]
  
              [He] throws his steep flight in many an aery wheel.
                                                    --Milton.
        [1913 Webster]
  
     A wheel within a wheel, or Wheels within wheels, a
        complication of circumstances, motives, etc.
  
     Balance wheel. See in the Vocab.
  
     Bevel wheel, Brake wheel, Cam wheel, Fifth wheel,
     Overshot wheel, Spinning wheel, etc. See under Bevel,
        Brake, etc.
  
     Core wheel. (Mach.)
        (a) A mortise gear.
        (b) A wheel having a rim perforated to receive wooden
            cogs; the skeleton of a mortise gear.
  
     Measuring wheel, an odometer, or perambulator.
  
     Wheel and axle (Mech.), one of the elementary machines or
        mechanical powers, consisting of a wheel fixed to an axle,
        and used for raising great weights, by applying the power
        to the circumference of the wheel, and attaching the
        weight, by a rope or chain, to that of the axle. Called
        also axis in peritrochio, and perpetual lever, -- the
        principle of equilibrium involved being the same as in the
        lever, while its action is continuous. See Mechanical
        powers, under Mechanical.
  
     Wheel animal, or Wheel animalcule (Zool.), any one of
        numerous species of rotifers having a ciliated disk at the
        anterior end.
  
     Wheel barometer. (Physics) See under Barometer.
  
     Wheel boat, a boat with wheels, to be used either on water
        or upon inclined planes or railways.
  
     Wheel bug (Zool.), a large North American hemipterous
        insect ({Prionidus cristatus) which sucks the blood of
        other insects. So named from the curious shape of the
        prothorax.
  
     Wheel carriage, a carriage moving on wheels.
  
     Wheel chains, or Wheel ropes (Naut.), the chains or ropes
        connecting the wheel and rudder.
  
     Wheel cutter, a machine for shaping the cogs of gear
        wheels; a gear cutter.
  
     Wheel horse, one of the horses nearest to the wheels, as
        opposed to a leader, or forward horse; -- called also
        wheeler.
  
     Wheel lathe, a lathe for turning railway-car wheels.
  
     Wheel lock.
        (a) A letter lock. See under Letter.
        (b) A kind of gunlock in which sparks were struck from a
            flint, or piece of iron pyrites, by a revolving wheel.
        (c) A kind of brake a carriage.
  
     Wheel ore (Min.), a variety of bournonite so named from the
        shape of its twin crystals. See Bournonite.
  
     Wheel pit (Steam Engine), a pit in the ground, in which the
        lower part of the fly wheel runs.
  
     Wheel plow, or Wheel plough, a plow having one or two
        wheels attached, to render it more steady, and to regulate
        the depth of the furrow.
  
     Wheel press, a press by which railway-car wheels are forced
        on, or off, their axles.
  
     Wheel race, the place in which a water wheel is set.
  
     Wheel rope (Naut.), a tiller rope. See under Tiller.
  
     Wheel stitch (Needlework), a stitch resembling a spider's
        web, worked into the material, and not over an open space.
        --Caulfeild & S. (Dict. of Needlework).
  
     Wheel+tree+(Bot.),+a+tree+({Aspidosperma+excelsum">Wheel tree (Bot.), a tree ({Aspidosperma excelsum) of
        Guiana, which has a trunk so curiously fluted that a
        transverse section resembles the hub and spokes of a
        coarsely made wheel. See Paddlewood.
  
     Wheel urchin (Zool.), any sea urchin of the genus Rotula
        having a round, flat shell.
  
     Wheel window (Arch.), a circular window having radiating
        mullions arranged like the spokes of a wheel. Cf. Rose
        window, under Rose.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
     A straight line, real or imaginary, passing through a body,
     on which it revolves, or may be supposed to revolve; a line
     passing through a body or system around which the parts are
     symmetrically arranged.
     [1913 Webster]
  
     2. (Math.) A straight line with respect to which the
        different parts of a magnitude are symmetrically arranged;
        as, the axis of a cylinder, i. e., the axis of a cone,
        that is, the straight line joining the vertex and the
        center of the base; the axis of a circle, any straight
        line passing through the center.
        [1913 Webster]
  
     3. (Bot.) The stem; the central part, or longitudinal
        support, on which organs or parts are arranged; the
        central line of any body. --Gray.
        [1913 Webster]
  
     4. (Anat.)
        (a) The second vertebra of the neck, or vertebra
            dentata.
        (b) Also used of the body only of the vertebra, which is
            prolonged anteriorly within the foramen of the first
            vertebra or atlas, so as to form the odontoid process
            or peg which serves as a pivot for the atlas and head
            to turn upon.
            [1913 Webster]
  
     5. (Crystallog.) One of several imaginary lines, assumed in
        describing the position of the planes by which a crystal
        is bounded.
        [1913 Webster]
  
     6. (Fine Arts) The primary or secondary central line of any
        design.
        [1913 Webster]
  
     Anticlinal axis (Geol.), a line or ridge from which the
        strata slope downward on the two opposite sides.
  
     Synclinal axis, a line from which the strata slope upward
        in opposite directions, so as to form a valley.
  
     Axis cylinder (Anat.), the neuraxis or essential, central
        substance of a nerve fiber; -- called also axis band,
        axial fiber, and cylinder axis.
  
     Axis in peritrochio, the wheel and axle, one of the
        mechanical powers.
  
     Axis of a curve (Geom.), a straight line which bisects a
        system of parallel chords of a curve; called a principal
        axis, when cutting them at right angles, in which case it
        divides the curve into two symmetrical portions, as in the
        parabola, which has one such axis, the ellipse, which has
        two, or the circle, which has an infinite number. The two
        axes of the ellipse are the major axis and the minor
        axis, and the two axes of the hyperbola are the
        transverse axis and the conjugate axis.
  
     Axis of a lens, the straight line passing through its
        center and perpendicular to its surfaces.
  
     Axis of a microscope or Axis of a telescope, the straight
        line with which coincide the axes of the several lenses
        which compose it.
  
     Axes of co["o]rdinates in a plane, two straight lines
        intersecting each other, to which points are referred for
        the purpose of determining their relative position: they
        are either rectangular or oblique.
  
     Axes of co["o]rdinates in space, the three straight lines
        in which the co["o]rdinate planes intersect each other.
  
     Axis of a balance, that line about which it turns.
  
     Axis of oscillation, of a pendulum, a right line passing
        through the center about which it vibrates, and
        perpendicular to the plane of vibration.
  
     Axis of polarization, the central line around which the
        prismatic rings or curves are arranged. --Brewster.
  
     Axis of revolution (Descriptive Geom.), a straight line
        about which some line or plane is revolved, so that the
        several points of the line or plane shall describe circles
        with their centers in the fixed line, and their planes
        perpendicular to it, the line describing a surface of
        revolution, and the plane a solid of revolution.
  
     Axis of symmetry (Geom.), any line in a plane figure which
        divides the figure into two such parts that one part, when
        folded over along the axis, shall coincide with the other
        part.
  
     Axis of the equator, ecliptic, horizon (or other circle
        considered with reference to the sphere on which it lies),
        the diameter of the sphere which is perpendicular to the
        plane of the circle. --Hutton.
  
     Axis of the Ionic capital (Arch.), a line passing
        perpendicularly through the middle of the eye of the
        volute.
  
     Neutral axis (Mech.), the line of demarcation between the
        horizontal elastic forces of tension and compression,
        exerted by the fibers in any cross section of a girder.
  
     Optic axis of a crystal, the direction in which a ray of
        transmitted light suffers no double refraction. All
        crystals, not of the isometric system, are either uniaxial
        or biaxial.
  
     Optic axis, Visual axis (Opt.), the straight line passing
        through the center of the pupil, and perpendicular to the
        surface of the eye.
  
     Radical axis of two circles (Geom.), the straight line
        perpendicular to the line joining their centers and such
        that the tangents from any point of it to the two circles
        shall be equal to each other.
  
     Spiral axis (Arch.), the axis of a twisted column drawn
        spirally in order to trace the circumvolutions without.
  
     Axis of abscissas and Axis of ordinates. See Abscissa.
        [1913 Webster]

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