Noun
regolith (countable and uncountable, plural regoliths)
(geology) The layer of loose rock, dust, sand, and soil, resting on the bedrock, that constitutes the surface layer of most dry land on Earth, the Moon, and other large solid aggregated celestial objects. Submarine regolith also exists.
Although such reflectance properties are different from those of any terrestrial terrains, they are typical of the regolith surfaces of airless Solar System bodies. Source: Internet
Aldrin bootprint; part of an experiment to test the properties of the lunar regolith The MESA failed to provide a stable work platform and was in shadow, slowing work somewhat. Source: Internet
Because of this process, older regolith appears more red in color compared to freshly exposed material. Source: Internet
Chlorine is very rare in lunar regolith, and a substantially faster rate of reproduction could be assured by importing modest amounts. Source: Internet
Chlorine is very rare in lunar regolith, so the design recycled it. Source: Internet
Consequently, the thin optical surface layer could be quite different from the regolith underneath, and not representative of the bulk composition of the body. Source: Internet