tombolo

noun, plural tom·bo·los.

1. a sand bar connecting an island to the mainland or to another island.

noun plural -los

1. a narrow sand or shingle bar linking a small island with another island or the mainland

n.

1899, from Italian tombolo “sand dune,” from Latin tumulus “hillock, mound” (see thigh).

1. A sand or gravel bar that connects an island to the mainland or to another island.