archipelago
https://gyazo.com/1518d324708b9aa5020d69020f027f5e
source: By Credit: Reto Stöckli, NASA Earth Observatory - Blue Marble Next Generation W/ Topography and Bathymetry (July 1 - 31, 2004) https://visibleearth.nasa.gov/view.php?id=73751, Public Domain
noun (plural archipelagos or archipelagoes)
a group of islands:
群島, 諸島; 多島海
e.g. the Indonesian archipelago.
a sea or stretch of water containing many islands.
〖the A-〗＝ the Aegean Sea.
ORIGIN
early 16th century: from Italian arcipelago, from Greek arkhi- ‘chief’ + pelagos ‘sea’. The word was originally used as a proper name (the Archipelago ‘the Aegean Sea’): the general sense arose because the Aegean Sea is notable for its large numbers of islands.