The Collaborative International Dictionary of English v.0.48:
Panhellenic \Pan`hel*len"ic\, a. [See Panhellenium.] Of or pertaining to all Greece, or to Panhellenism; including all Greece, or all the Greeks. [1913 Webster]WordNet (r) 3.0 (2006):
Pan-Hellenic adj 1: of or relating to all the Greeks; "the Olympic Games were a Panhellenic celebration" [syn: Panhellenic, Pan- Hellenic]