regolith

American  

[reg-uh-lith] / ˈrɛg ə lɪθ /

noun

1. mantle rock.

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regolith British  

/ ˈrɛɡəlɪθ /

noun

1. the layer of loose material covering the bedrock of the earth and moon, etc, comprising soil, sand, rock fragments, volcanic ash, glacial drift, etc

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regolith Scientific  

/ rĕg′ə-lĭth′ /

1. The layer of rock and mineral fragments that rests on bedrock and is produced by the weathering of rocks. Regolith constitutes the surface of most land.

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Etymology

Origin of regolith

1895–1900; < Greek rhêgo ( s ) rug, blanket + -lith

Example Sentences

See Examples For:

regolith

The contrast suggests that solar wind particles penetrated much farther into the far side regolith.

From Science Daily ● Jul. 21, 2026

The Chang'e 6 regolith had an average 20Ne/22Ne ratio of 11.34 ± 0.22.

From Science Daily ● Jul. 21, 2026

Paul Burke, at Johns Hopkins Applied Physics Laboratory, says Apollo regolith samples might have lost some of their helium-3 on their return to Earth, skewing our understanding of how much is there.

From BBC ● Jun. 16, 2026

However, samples of moon dust, or regolith, from the Apollo missions suggest it may be present there at relatively high concentrations.

From BBC ● Jun. 16, 2026

“There is water in the regolith somewhere,” Mr. Kshatriya continues.

From The Wall Street Journal ● May 15, 2026