An Etymological Dictionary of Astronomy and Astrophysics

1. The layer of rocky → debris and → dust that forms the uppermost surface of → planets, → natural satellites, and → asteroids. Regolith on Earth is a product of → weathering.
   

2. In particular, → lunar regolith.

Etymology (EN): From Gk. regho(s) “rug, blanket” + -lith, from lithos “stone.”

Etymology (PE): Sangpuš, literally “stone, rock covering,” from sang “→ stone, rock,” + puš present stem of pušidan “to cover; to put on,” → envelop.