The layer of unconsolidated rocky material covering bedrock.
- ‘The surface of the Moon is covered by a soil layer called regolith, which has been produced by meteorite impact.’
- ‘The Moon's crust is composed of a material known as regolith.’
- ‘The regolith is a small-grained material resulting from multiple impacts on the moon's surface.’
- ‘Many images show evidence of a thick loose regolith or gravel/sand/silt layer that could be collected easily by scooping or shoveling.’
- ‘Alteration of the bedrock produces a regolith, the base of which is known as the weathering front.’
Late 19th century: from Greek rhēgos rug, blanket + -lith.