The Collaborative International Dictionary of English v.0.48:

Univocal \U*niv"o*cal\, a. [L. univocus; unus one + vox, vocis,
   a voice, word. See One, and Voice.]
   1. Having one meaning only; -- contrasted with equivocal.
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   2. Having unison of sound, as the octave in music. See
      Unison, n., 2.
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   3. Having always the same drift or tenor; uniform; certain;
      regular. [R.] --Sir T. Browne.
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   4. Unequivocal; indubitable. [Obs.] --Jer. Taylor.
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The Collaborative International Dictionary of English v.0.48:

Univocal \U*niv"o*cal\, n.
   1. (Aristotelian Logic) A generic term, or a term applicable
      in the same sense to all the species it embraces.
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   2. A word having but one meaning.
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WordNet (r) 3.0 (2006):

univocal
    adj 1: admitting of no doubt or misunderstanding; having only
           one meaning or interpretation and leading to only one
           conclusion; "unequivocal evidence"; "took an unequivocal
           position"; "an unequivocal success"; "an unequivocal
           promise"; "an unequivocal (or univocal) statement" [syn:
           unequivocal, univocal, unambiguous] [ant:
           ambiguous, equivocal]