The Collaborative International Dictionary of English v.0.48:

Aphoristic \Aph`o*ris"tic\, Aphoristical \Aph`o*ris"tic*al\, a.
   [Gr. ?.]
   In the form of, or of the nature of, an aphorism; in the form
   of short, unconnected sentences; as, an aphoristic style.
   [1913 Webster]

         The method of the book is aphoristic.    --De Quincey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

aphoristic
    adj 1: containing aphorisms or maxims; "axiomatic wisdom" [syn:
           axiomatic, aphoristic]
    2: terse and witty and like a maxim; "much given to apothegmatic
       instruction" [syn: aphoristic, apothegmatic,
       epigrammatic]