Inflected forms: pl. ar·chi·pel·a·goes or ar·chi·pel·a·gos 1. A large group of islands: the Philippine archipelago.2. A sea, such as the Aegean, containing a large number of scattered islands.
ETYMOLOGY:
Italian Arcipelago, the Aegean Sea, alteration (influenced by arci-, chief, archi-) of Medieval Latin gopelagus : Latin Aegaeus, gus, Aegean (from Greek Aigaios) + Latin pelagus, sea (from Greek pelagos; see plk-1 in Appendix I).