The Collaborative International Dictionary of English v.0.48:

Habitude \Hab"i*tude\ (h[a^]b"[i^]*t[=u]d), n. [F., fr. L.
   habitudo condition. See Habit.]
   1. Habitual attitude; usual or accustomed state with
      reference to something else; established or usual
      relations. --South.
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            The same ideas having immutably the same habitudes
            one to another.                       --Locke.
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            The verdict of the judges was biased by nothing else
            than their habitudes of thinking.     --Landor.
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   2. Habitual association, intercourse, or familiarity.
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            To write well, one must have frequent habitudes with
            the best company.                     --Dryden.
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   3. Habit of body or of action. --Shak.
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            It is impossible to gain an exact habitude without
            an infinite number of acts and perpetual practice.
                                                  --Dryden.
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WordNet (r) 3.0 (2006):

habitude
    n 1: habitual mode of behavior