Tombo

…When an island near the coast that was separated from the continent (or a large island) becomes connected to the mainland by the development of a long, narrow sandbar or a triangular sandy landform called a cuspate spit, the island is called an island-tied island. The sandbar that connects the island to the mainland is called a tombolo. When there is an island near the coast, the waves that come in from offshore are refracted or diffracted by the island and go around the back of the island. …

*Some of the terminology explanations that mention "tombolo" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…大陸(または大きな島)から離れていた海岸近くの島が，細長い砂州または三角形をした尖角州cuspate spitと呼ばれる砂地形の発達によって，陸続きになった場合に，この島を陸繫島という。またこの島と本土をつなぐ砂州をとくに陸繫砂州(トンボロtombolo)という。海岸近くに離れ島があると，沖合から打ち寄せる波は島のために屈折あるいは回折して，島の後ろ側に回りこむ。…

※「tombolo」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報