The Collaborative International Dictionary of English v.0.48:

Prudential \Pru*den"tial\, a.
   1. Proceeding from, or dictated or characterized by,
      prudence; prudent; discreet; sometimes, selfish or
      pecuniary as distinguished from higher motives or
      influences; as, prudential motives. " A prudential line of
      conduct." --Sir W. Scott.
      [1913 Webster]

   2. Exercising prudence; discretionary; advisory;
      superintending or executive; as, a prudential committee.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prudential \Pru*den"tial\, n.
   That which relates to or demands the exercise of, discretion
   or prudence; -- usually in the pl.
   [1913 Webster]

         Many stanzas, in poetic measures, contain rules
         relating to common prudentials as well as to religion.
                                                  --I. Watts.
   [1913 Webster]

WordNet (r) 3.0 (2006):

prudential
    adj 1: arising from or characterized by prudence especially in
           business matters; "he abstained partly for prudential
           reasons"