The Collaborative International Dictionary of English v.0.48:

Retract \Re*tract"\, n. (Far.)
   The pricking of a horse's foot in nailing on a shoe.
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The Collaborative International Dictionary of English v.0.48:

Retract \Re*tract"\, v. i.
   1. To draw back; to draw up; as, muscles retract after
      amputation.
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   2. To take back what has been said; to withdraw a concession
      or a declaration.
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            She will, and she will not; she grants, denies,
            Consents, retracts, advances, and then files.
                                                  --Granville.
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The Collaborative International Dictionary of English v.0.48:

Retract \Re*tract"\ (r[-e]*tr[=a]kt"), v. t. [imp. & p. p.
   Retracted; p. pr. & vb. n. Retracting.] [F. r['e]tracter,
   L. retractare, retractatum, to handle again, reconsider,
   retract, fr. retrahere, retractum, to draw back. See
   Retreat.]
   1. To draw back; to draw up or shorten; as, the cat can
      retract its claws; to retract a muscle.
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   2. To withdraw; to recall; to disavow; to recant; to take
      back; as, to retract an accusation or an assertion.
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            I would as freely have retracted this charge of
            idolatry as I ever made it.           --Bp.
                                                  Stillingfleet.
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   3. To take back,, as a grant or favor previously bestowed; to
      revoke. [Obs.] --Woodward.
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   Syn: To recall; withdraw; rescind; revoke; unsay; disavow;
        recant; abjure; disown.
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Moby Thesaurus II by Grady Ward, 1.0:

111 Moby Thesaurus words for "retract":
   abandon, abjure, abolish, abrogate, annul, assert the contrary,
   back, back down, back out, backwater, belie, cancel, cede,
   climb down, contest, contradict, contravene, controvert, counter,
   countermand, counterorder, crawfish out, cringe, cross, deny,
   disaffirm, disallow, disannul, disavow, disclaim, disgorge, disown,
   dispense with, dispose of, disprove, dispute, do away with,
   do without, draw back, draw in, drop, duck, dump, eat crow,
   eat humble pie, fall back, flinch, forgo, forswear, gainsay,
   get along without, get rid of, give away, give up, have done with,
   impugn, invalidate, join issue upon, kiss good-bye,
   make a sacrifice, make void, not accept, not admit, nullify,
   oppose, override, overrule, palinode, part with, pull back,
   pull in, pull out, quitclaim, recall, recant, refuse to admit,
   refute, relinquish, render up, renege, renounce, repeal, repudiate,
   rescind, resign, retreat, retrocede, retrograde, reverse, revoke,
   sacrifice, set aside, shrink, shy, spare, surrender, suspend,
   swallow, swear off, take, take back, take issue with, throw up,
   unsay, vacate, void, waive, wince, withdraw, write off, yield