Island
An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island in a river or a lake island may be called an eyot or ait, and a small island off the coast may be called a holm. A grouping of geographically or geologically related islands is called an archipelago, such as the Philippines.
Snake Island (Black Sea)
The status of Snake Island was important for delimitation of continental shelf and exclusive economic zones between the two countries. If Snake Island were recognized as an island, then continental shelf around it should be considered as Ukrainian water. If Snake Island were not an island, but a rock, then in accordance with international law the maritime boundary between Romania and Ukraine should be drawn without taking into consideration the isle location.