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2 definitions found
 for Twist drill
From The Collaborative International Dictionary of English v.0.48 :

  Twist \Twist\, n.
     1. The act of twisting; a contortion; a flexure; a
        convolution; a bending.
        [1913 Webster]
              Not the least turn or twist in the fibers of any one
              animal which does not render them more proper for
              that particular animal's way of life than any other
              cast or texture.                      --Addison.
        [1913 Webster]
     2. The form given in twisting.
        [1913 Webster]
              [He] shrunk at first sight of it; he found fault
              with the length, the thickness, and the twist.
        [1913 Webster]
     3. That which is formed by twisting, convoluting, or uniting
        parts. Specifically: 
        [1913 Webster]
        (a) A cord, thread, or anything flexible, formed by
            winding strands or separate things round each other.
            [1913 Webster]
        (b) A kind of closely twisted, strong sewing silk, used by
            tailors, saddlers, and the like.
            [1913 Webster]
        (c) A kind of cotton yarn, of several varieties.
            [1913 Webster]
        (d) A roll of twisted dough, baked.
            [1913 Webster]
        (e) A little twisted roll of tobacco.
            [1913 Webster]
        (f) (Weaving) One of the threads of a warp, -- usually
            more tightly twisted than the filling.
            [1913 Webster]
        (g) (Firearms) A material for gun barrels, consisting of
            iron and steel twisted and welded together; as,
            Damascus twist.
            [1913 Webster]
        (h) (Firearms & Ord.) The spiral course of the rifling of
            a gun barrel or a cannon.
            [1913 Webster]
        (i) A beverage made of brandy and gin. [Slang]
            [1913 Webster]
     4. [OE.; -- so called as being a two-forked branch. See
        Twist, v. t.] A twig. [Obs.] --Chaucer. Fairfax.
        [1913 Webster]
     5. Act of imparting a turning or twisting motion, as to a
        pitched ball; also, the motion thus imparted; as, the
        twist of a billiard ball.
        [Webster 1913 Suppl.]
     6. A strong individual tendency, or bent; a marked
        inclination; a bias; -- often implying a peculiar or
        unusual tendency; as, a twist toward fanaticism.
        [Webster 1913 Suppl.]
     Gain twist, or Gaining twist (Firearms), twist of which
        the pitch is less, and the inclination greater, at the
        muzzle than at the breech.
     Twist drill, a drill the body of which is twisted like that
        of an auger. See Illust. of Drill.
     Uniform twist (Firearms), a twist of which the spiral
        course has an equal pitch throughout.
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  twist drill
      n 1: a bit or drill having deep helical grooves [syn: twist
           bit, twist drill]

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