Nabkha

thumb|right|250px|Nabkha around Prosopis glandulosa|honey mesquite (Prosopis glandulosa) in [[California]] thumb|Nabkha dune with tamarisk trees (Tamarix spec.) in the Algerian Sahara

A nabkha, nebkha or nebka is a type of sand dune. Other terms used include coppice dune and dune hummock or hummocky dune, but these more accurately refer to similar, but different, sand dune types. Authors have also used the terms phytogenic hillock, bush-mound, shrub-coppice dune, knob dune, dune tumulus, rebdou, nebbe, and takouit.