[1] : The Collaborative International Dictionary of English v.0.48

oblique \oblique"\, 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.
                                                  --wordworth.
      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
      askew.

   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
      example.

   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 25deg. 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
see also:
ob- oblike oblique angle oblique ascension angle ascension 
oblique arch oblique bridge bridge oblique case case 
oblique circle oblique fire oblique flank oblique leaf oblique line 
oblique motion oblique muscle oblique narration oblique speech oblique planes 
oblique sailing oblique sphere oblique step oblique system of coordinates 

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