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1 definition found
 for Pin drill
From The Collaborative International Dictionary of English v.0.48 :

  Pin \Pin\, n. [OE. pinne, AS. pinn a pin, peg; cf. D. pin, G.
     pinne, Icel. pinni, W. pin, Gael. & Ir. pinne; all fr. L.
     pinna a pinnacle, pin, feather, perhaps orig. a different
     word from pinna feather. Cf. Fin of a fish, Pen a
     1. A piece of wood, metal, etc., generally cylindrical, used
        for fastening separate articles together, or as a support
        by which one article may be suspended from another; a peg;
        a bolt.
        [1913 Webster]
              With pins of adamant
              And chains they made all fast.        --Milton.
        [1913 Webster]
     2. Especially, a small, pointed and headed piece of brass or
        other wire (commonly tinned), largely used for fastening
        clothes, attaching papers, etc.
        [1913 Webster]
     3. Hence, a thing of small value; a trifle.
        [1913 Webster]
              He . . . did not care a pin for her.  --Spectator.
        [1913 Webster]
     4. That which resembles a pin in its form or use; as:
        (a) A peg in musical instruments, for increasing or
            relaxing the tension of the strings.
        (b) A linchpin.
        (c) A rolling-pin.
        (d) A clothespin.
        (e) (Mach.) A short shaft, sometimes forming a bolt, a
            part of which serves as a journal. See Illust. of
            Knuckle joint, under Knuckle.
        (f) (Joinery) The tenon of a dovetail joint.
            [1913 Webster]
     5. One of a row of pegs in the side of an ancient drinking
        cup to mark how much each man should drink.
        [1913 Webster]
     6. The bull's eye, or center, of a target; hence, the center.
        [Obs.] "The very pin of his heart cleft." --Shak.
        [1913 Webster]
     7. Mood; humor. [Obs.] "In merry pin." --Cowper.
        [1913 Webster]
     8. (Med.) Caligo. See Caligo. --Shak.
        [1913 Webster]
     9. An ornament, as a brooch or badge, fastened to the
        clothing by a pin; as, a Masonic pin.
        [1913 Webster]
     10. The leg; as, to knock one off his pins. [Slang]
         [1913 Webster]
     Banking pin (Horol.), a pin against which a lever strikes,
        to limit its motion.
     Pin drill (Mech.), a drill with a central pin or projection
        to enter a hole, for enlarging the hole, or for sinking a
        recess for the head of a bolt, etc.; a counterbore.
     Pin grass. (Bot.) See Alfilaria.
     Pin hole, a small hole made by a pin; hence, any very small
        aperture or perforation.
     Pin lock, a lock having a cylindrical bolt; a lock in which
        pins, arranged by the key, are used instead of tumblers.
     Pin money, an allowance of money, as that made by a husband
        to his wife, for private and personal expenditure.
     Pin rail (Naut.), a rail, usually within the bulwarks, to
        hold belaying pins. Sometimes applied to the fife rail.
        Called also pin rack.
     Pin wheel.
         (a) A contrate wheel in which the cogs are cylindrical
         (b) (Fireworks) A small coil which revolves on a common
             pin and makes a wheel of yellow or colored fire.
             [1913 Webster]

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