Epideictic

from WordNet (r) 3.0 (2006)

epideictic
    adj 1: designed primarily for rhetorical display; "epideictic
           orations" [syn: {epideictic}, {epideictical}]

from The Collaborative International Dictionary of English v.0.48

Epideictic \Ep`i*deic"tic\, a. [Gr. ?, fr. ? to show forth,
   display; 'epi` + ? to show. Cf. {Epidictic}.]
   Serving to show forth, explain, or exhibit; -- applied by the
   Greeks to a kind of oratory, which, by full amplification,
   seeks to persuade. Epidemic