The Collaborative International Dictionary of English v.0.48:

Fracture \Frac"ture\ (?; 135), n. [L. fractura, fr. frangere,
   fractum, to break: cf. F. fracture. See Fraction.]
   1. The act of breaking or snapping asunder; rupture; breach.
      [1913 Webster]

   2. (Surg.) The breaking of a bone.
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   3. (Min.) The texture of a freshly broken surface; as, a
      compact fracture; an even, hackly, or conchoidal fracture.
      [1913 Webster]

   Comminuted fracture (Surg.), a fracture in which the bone
      is broken into several parts.

   Complicated fracture (Surg.), a fracture of the bone
      combined with the lesion of some artery, nervous trunk, or
      joint.

   Compound fracture (Surg.), a fracture in which there is an
      open wound from the surface down to the fracture.

   Simple fracture (Surg.), a fracture in which the bone only
      is ruptured. It does not communicate with the surface by
      an open wound.

   Syn: Fracture, Rupture.

   Usage: These words denote different kinds of breaking,
          according to the objects to which they are applied.
          Fracture is applied to hard substances; as, the
          fracture of a bone. Rupture is oftener applied to soft
          substances; as, the rupture of a blood vessel. It is
          also used figuratively. "To be an enemy and once to
          have been a friend, does it not embitter the rupture?"
          --South.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Compound \Com"pound\, a. [OE. compouned, p. p. of compounen. See
   Compound, v. t.]
   Composed of two or more elements, ingredients, parts;
   produced by the union of several ingredients, parts, or
   things; composite; as, a compound word.
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         Compound substances are made up of two or more simple
         substances.                              --I. Watts.
   [1913 Webster]

   Compound addition, subtraction, multiplication,
   division (Arith.), the addition, subtraction, etc., of
      compound numbers.

   Compound crystal (Crystallog.), a twin crystal, or one
      seeming to be made up of two or more crystals combined
      according to regular laws of composition.

   Compound engine (Mech.), a form of steam engine in which
      the steam that has been used in a high-pressure cylinder
      is made to do further service in a larger low-pressure
      cylinder, sometimes in several larger cylinders,
      successively.

   Compound ether. (Chem.) See under Ether.

   Compound flower (Bot.), a flower head resembling a single
      flower, but really composed of several florets inclosed in
      a common calyxlike involucre, as the sunflower or
      dandelion.

   Compound fraction. (Math.) See Fraction.

   Compound fracture. See Fracture.

   Compound householder, a householder who compounds or
      arranges with his landlord that his rates shall be
      included in his rents. [Eng.]

   Compound interest. See Interest.

   Compound larceny. (Law) See Larceny.

   Compound leaf (Bot.), a leaf having two or more separate
      blades or leaflets on a common leafstalk.

   Compound microscope. See Microscope.

   Compound motion. See Motion.

   Compound number (Math.), one constructed according to a
      varying scale of denomination; as, 3 cwt., 1 qr., 5 lb.;
      -- called also denominate number.

   Compound pier (Arch.), a clustered column.

   Compound quantity (Alg.), a quantity composed of two or
      more simple quantities or terms, connected by the sign +
      (plus) or - (minus). Thus, a + b - c, and bb - b, are
      compound quantities.

   Compound radical. (Chem.) See Radical.

   Compound ratio (Math.), the product of two or more ratios;
      thus ab:cd is a ratio compounded of the simple ratios a:c
      and b:d.

   Compound rest (Mech.), the tool carriage of an engine
      lathe.

   Compound screw (Mech.), a screw having on the same axis two
      or more screws with different pitch (a differential
      screw), or running in different directions (a right and
      left screw).

   Compound time (Mus.), that in which two or more simple
      measures are combined in one; as, 6-8 time is the joining
      of two measures of 3-8 time.

   Compound word, a word composed of two or more words;
      specifically, two or more words joined together by a
      hyphen.
      [1913 Webster]

WordNet (r) 3.0 (2006):

compound fracture
    n 1: bone fracture associated with lacerated soft tissue or an
         open wound [syn: compound fracture, open fracture]