1. [n]  any projection that is thought to resemble an arm; "the arm of the record player"; "an arm of the sea"; "a branch of the sewer"
2. [n]  the graduated arc that is attached to an instrument for measuring angles; "the limb of the sextant"
3. [n]  either of the two halves of a bow from handle to tip; "the upper limb of the bow"
4. [n]  one of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper
5. [n]  (astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet
6. [n]  any of the main branches arising from the trunk or a bough of a tree

Limb
Limb

more details ...

1. \Limb\ (l[i^]m), n. [OE. lim, AS. lim; akin to Icel. limr
   limb, lim branch of a tree, Sw. & Dan. lem limb; cf. also AS.
   li[eth], OHG. lid, gilid, G. glied, Goth. li[thorn]us. Cf.
   {Lith}, {Limber}.]
   1. A part of a tree which extends from the trunk and
      separates into branches and twigs; a large branch.
   2. An arm or a leg of a human being; a leg, arm, or wing of
      an animal.
            A second Hector for his grim aspect, And large
            proportion of his strong-knit limbs.  --Shak.
   3. A thing or person regarded as a part or member of, or
      attachment to, something else. --Shak.
            That little limb of the devil has cheated the
            gallows.                              --Sir W.
                                                  Scott.
   4. An elementary piece of the mechanism of a lock.
   {Limb of the law}, a lawyer or an officer of the law.
      [Colloq.] --Landor.
   

2. \Limb\, v. t.
   1. To supply with limbs. [R.] --Milton.
   2. To dismember; to tear off the limbs of.
   

3. \Limb\, n. [L. limbus border. Cf. {Limbo}, {Limbus}.]
   A border or edge, in certain special uses.
   (a) (Bot.) The border or upper spreading part of a
       monopetalous corolla, or of a petal, or sepal; blade.
   (b) (Astron.) The border or edge of the disk of a heavenly
       body, especially of the sun and moon.
   (c) The graduated margin of an arc or circle, in an
       instrument for measuring angles.
   

1. A leg or arm.
2. A branch of a tree.
3. The upper, free, spreading portion of a corolla or perianth that is connate at the base.