Spanish Duna Cited by user Adolfobrigido on 13 Oct 2023 Una duna o médano es una acumulación de arena en los desiertos o el litoral, generada por el viento, por lo que las dunas poseen unas capas suaves y uniformes.
English Sand Cited by user Uniquepw on 09 Mar 2021 Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size.
English Dune Cited by user Hardyplants on 18 Nov 2020 A dune is a landform, and is a large mass of wind-blown sand. Dunes are most common in deserted environments, such as the Sahara, and also near beaches.