The Collaborative International Dictionary of English v.0.48:

Proditorious \Prod`i*to"ri*ous\, a. [Cf. OF. proditoire.]
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   1. Treacherous; perfidious; traitorous. [Obs.] --Daniel.
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   2. Apt to make unexpected revelations. [Obs.] "Nature is
      proditorious." --Sir H. Wotton.
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