Word Study
epideictic
CIDE DICTIONARY
epideictic, 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.
OXFORD DICTIONARY
epideictic, adj. meant for effect or display, esp. in speaking.
Etymology
Gk epideiktikos (as EPI-, deiknumi show)
For further exploring for "epideictic" in Webster Dictionary Online