Sinonimi: sand dune
ETYM The same word as down: cf. Dutch duin. Related to Down a bank of sand.
A ridge of sand created by the wind; found in deserts or near lakes and oceans; SYN. sand dune.
Mound or ridge of wind-drifted sand common on coasts and in sandy deserts. Loose sand is blown and bounced along by the wind, up the windward side of a dune. The sand particles then fall to rest on the lee side, while more are blown up from the windward side. In this way a dune moves gradually downwind.
In sandy deserts, the typical crescent-shaped dune is called a barchan. Seif dunes are longitudinal and lie parallel to the wind direction, and star-shaped dunes are formed by irregular winds.
A submerged bank of sand near a shore or in a river; can be exposed at low tide.
ETYM AS. scolu, sceolu, a company, multitude, crowd, akin to OS. skola; probably originally, a division, and akin to Icel. skilja to part, divide. Related to Skill, School. of fishes.
1. A sandbank in a stretch of water that is visible at low tide.
2. A stretch of shallow water; SYN. shallow.