The Collaborative International Dictionary of English v.0.48:

Limb \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.
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   2. An arm or a leg of a human being; a leg, arm, or wing of
      an animal.
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            A second Hector for his grim aspect,
            And large proportion of his strong-knit limbs.
                                                  --Shak.
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   3. A thing or person regarded as a part or member of, or
      attachment to, something else. --Shak.
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            That little limb of the devil has cheated the
            gallows.                              --Sir W.
                                                  Scott.
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   4. An elementary piece of the mechanism of a lock.
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   Limb of the law, a lawyer or an officer of the law.
      [Colloq.] --Landor.
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