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3 definitions found
 for Oblique angle
From The Collaborative International Dictionary of English v.0.48 :

  Oblique \Ob*lique"\, a. [F., fr. L. obliquus; ob (see Ob-) +
     liquis oblique; cf. licinus bent upward, Gr. le`chrios
     slanting.] [Written also oblike.]
     [1913 Webster]
     1. Not erect or perpendicular; neither parallel to, nor at
        right angles from, the base; slanting; inclined.
        [1913 Webster]
              It has a direction oblique to that of the former
              motion.                               --Cheyne.
        [1913 Webster]
     2. Not straightforward; indirect; obscure; hence,
        disingenuous; underhand; perverse; sinister.
        [1913 Webster]
              The love we bear our friends . . .
              Hath in it certain oblique ends.      --Drayton.
        [1913 Webster]
              This mode of oblique research, when a more direct
              one is denied, we find to be the only one in our
              power.                                --De Quincey.
        [1913 Webster]
              Then would be closed the restless, oblique eye.
              That looks for evil, like a treacherous spy.
        [1913 Webster]
     3. Not direct in descent; not following the line of father
        and son; collateral.
        [1913 Webster]
              His natural affection in a direct line was strong,
              in an oblique but weak.               --Baker.
        [1913 Webster]
     Oblique angle, Oblique ascension, etc. See under Angle,
        Ascension, etc.
     Oblique arch (Arch.), an arch whose jambs are not at right
        angles with the face, and whose intrados is in consequence
     Oblique bridge, a skew bridge. See under Bridge, n.
     Oblique case (Gram.), any case except the nominative. See
        Case, n.
     Oblique circle (Projection), a circle whose plane is
        oblique to the axis of the primitive plane.
     Oblique fire (Mil.), a fire the direction of which is not
        perpendicular to the line fired at.
     Oblique flank (Fort.), that part of the curtain whence the
        fire of the opposite bastion may be discovered. --Wilhelm.
     Oblique leaf. (Bot.)
        (a) A leaf twisted or inclined from the normal position.
        (b) A leaf having one half different from the other.
     Oblique line (Geom.), a line that, meeting or tending to
        meet another, makes oblique angles with it.
     Oblique motion (Mus.), a kind of motion or progression in
        which one part ascends or descends, while the other
        prolongs or repeats the same tone, as in the accompanying
     Oblique muscle (Anat.), a muscle acting in a direction
        oblique to the mesial plane of the body, or to the
        associated muscles; -- applied especially to two muscles
        of the eyeball.
     Oblique narration. See Oblique speech.
     Oblique planes (Dialing), planes which decline from the
        zenith, or incline toward the horizon.
     Oblique sailing (Naut.), the movement of a ship when she
        sails upon some rhumb between the four cardinal points,
        making an oblique angle with the meridian.
     Oblique speech (Rhet.), speech which is quoted indirectly,
        or in a different person from that employed by the
        original speaker.
     Oblique sphere (Astron. & Geog.), the celestial or
        terrestrial sphere when its axis is oblique to the horizon
        of the place; or as it appears to an observer at any point
        on the earth except the poles and the equator.
     Oblique step (Mil.), a step in marching, by which the
        soldier, while advancing, gradually takes ground to the
        right or left at an angle of about 25[deg]. It is not now
        practiced. --Wilhelm.
     Oblique system of coordinates (Anal. Geom.), a system in
        which the coordinate axes are oblique to each other.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Angle \An"gle\ ([a^][ng]"g'l), n. [F. angle, L. angulus angle,
     corner; akin to uncus hook, Gr. 'agky`los bent, crooked,
     angular, 'a`gkos a bend or hollow, AS. angel hook, fish-hook,
     G. angel, and F. anchor.]
     1. The inclosed space near the point where two lines meet; a
        corner; a nook.
        [1913 Webster]
              Into the utmost angle of the world.   --Spenser.
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              To search the tenderest angles of the heart.
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     2. (Geom.)
        (a) The figure made by. two lines which meet.
        (b) The difference of direction of two lines. In the lines
            meet, the point of meeting is the vertex of the angle.
            [1913 Webster]
     3. A projecting or sharp corner; an angular fragment.
        [1913 Webster]
              Though but an angle reached him of the stone.
        [1913 Webster]
     4. (Astrol.) A name given to four of the twelve astrological
        "houses." [Obs.] --Chaucer.
        [1913 Webster]
     5. [AS. angel.] A fishhook; tackle for catching fish,
        consisting of a line, hook, and bait, with or without a
        [1913 Webster]
              Give me mine angle: we 'll to the river there.
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              A fisher next his trembling angle bears. --Pope.
        [1913 Webster]
     Acute angle, one less than a right angle, or less than
     Adjacent or Contiguous angles, such as have one leg
        common to both angles.
     Alternate angles. See Alternate.
     Angle bar.
        (a) (Carp.) An upright bar at the angle where two faces of
            a polygonal or bay window meet. --Knight.
        (b) (Mach.) Same as Angle iron.
     Angle bead (Arch.), a bead worked on or fixed to the angle
        of any architectural work, esp. for protecting an angle of
        a wall.
     Angle brace, Angle tie (Carp.), a brace across an
        interior angle of a wooden frame, forming the hypothenuse
        and securing the two side pieces together. --Knight.
     Angle iron (Mach.), a rolled bar or plate of iron having
        one or more angles, used for forming the corners, or
        connecting or sustaining the sides of an iron structure to
        which it is riveted.
     Angle leaf (Arch.), a detail in the form of a leaf, more or
        less conventionalized, used to decorate and sometimes to
        strengthen an angle.
     Angle meter, an instrument for measuring angles, esp. for
        ascertaining the dip of strata.
     Angle shaft (Arch.), an enriched angle bead, often having a
        capital or base, or both.
     Curvilineal angle, one formed by two curved lines.
     External angles, angles formed by the sides of any
        right-lined figure, when the sides are produced or
     Facial angle. See under Facial.
     Internal angles, those which are within any right-lined
     Mixtilineal angle, one formed by a right line with a curved
     Oblique angle, one acute or obtuse, in opposition to a
        right angle.
     Obtuse angle, one greater than a right angle, or more than
     Optic angle. See under Optic.
     Rectilineal or Right-lined angle, one formed by two right
     Right angle, one formed by a right line falling on another
        perpendicularly, or an angle of 90[deg] (measured by a
        quarter circle).
     Solid angle, the figure formed by the meeting of three or
        more plane angles at one point.
     Spherical angle, one made by the meeting of two arcs of
        great circles, which mutually cut one another on the
        surface of a globe or sphere.
     Visual angle, the angle formed by two rays of light, or two
        straight lines drawn from the extreme points of an object
        to the center of the eye.
     For Angles of commutation, draught, incidence,
     reflection, refraction, position, repose, fraction,
        see Commutation, Draught, Incidence, Reflection,
        Refraction, etc.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  oblique angle
      n 1: an angle that is not a right angle or a multiple of a right
           angle [ant: right angle]

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