drill jig

Jig \Jig\, n. [OF. gigue a stringed instrument, a kind of dance,
   F. gigue dance, tune, gig; of German origin; cf. MHG.
   g[imac]ge fiddle, G. geige. Cf. {Gig} a fiddle, {Gig} a
   whirligig.]
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   1. (Mus.) A light, brisk musical movement.
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            Hot and hasty, like a Scotch jig.     --Shak.
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   3. A light, humorous piece of writing, esp. in rhyme; a farce
      in verse; a ballad. [Obs.]
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            A jig shall be clapped at, and every rhyme
            Praised and applauded.                --Beau. & Fl.
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   4. A piece of sport; a trick; a prank. [Obs.]
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            Is't not a fine jig,
            A precious cunning, in the late Protector? --Beau. &
                                                  Fl.
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   5. A trolling bait, consisting of a bright spoon and a hook
      attached.
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   6. (Mach.)
      (a) A small machine or handy tool; esp.: (Metal Working) A
          contrivance fastened to or inclosing a piece of work,
          and having hard steel surfaces to guide a tool, as a
          drill, or to form a shield or template to work to, as
          in filing.
      (b) (Mining) An apparatus or a machine for jigging ore.
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   {Drill jig}, a jig for guiding a drill. See {Jig}, 6
      (a) .

   {Jig drilling}, {Jig filing} (Metal Working), a process of
      drilling or filing in which the action of the tool is
      directed or limited by a jig.

   {Jig saw}, a sawing machine with a narrow, vertically
      reciprocating saw, used to cut curved and irregular lines,
      or ornamental patterns in openwork, a scroll saw; --
      called also {gig saw}.
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Drill \Drill\, n.
   1. An instrument with an edged or pointed end used for making
      holes in hard substances; strictly, a tool that cuts with
      its end, by revolving, as in drilling metals, or by a
      succession of blows, as in drilling stone; also, a drill
      press.
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   2. (Mil.) The act or exercise of training soldiers in the
      military art, as in the manual of arms, in the execution
      of evolutions, and the like; hence, diligent and strict
      instruction and exercise in the rudiments and methods of
      any business; a kind or method of military exercises; as,
      infantry drill; battalion drill; artillery drill.
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   3. Any exercise, physical or mental, enforced with regularity
      and by constant repetition; as, a severe drill in Latin
      grammar.
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   4. (Zool.) A marine gastropod, of several species, which
      kills oysters and other bivalves by drilling holes through
      the shell. The most destructive kind is {Urosalpinx
      cinerea}.
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   {Bow drill}, {Breast drill}. See under {Bow}, {Breast}.

   {Cotter drill}, or {Traverse drill}, a machine tool for
      drilling slots.

   {Diamond drill}. See under {Diamond}.

   {Drill jig}. See under {Jig}.

   {Drill pin}, the pin in a lock which enters the hollow stem
      of the key.

   {Drill sergeant} (Mil.), a noncommissioned officer whose
      office it is to instruct soldiers as to their duties, and
      to train them to military exercises and evolutions.

   {Vertical drill}, a drill press.
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