regolith
noun
reg·o·lith
ˈre-gə-ˌlith 
: unconsolidated residual or transported material that overlies the solid rock on the earth, moon, or a planet
Examples of regolith in a Sentence
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Even if a harvester can outgas regolith reliably, separating minute traces of helium-3 from helium-4 and other gases at low mass fractions requires sophisticated cryogenic or membrane systems.
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Kaif Shaikh, Interesting Engineering, 24 Sep. 2025
Matt Damon’s character would probably not have survived on the real Mars of today, because its rocklike surface, called regolith, is too full of salts and toxic chemicals such as perchlorate for potatoes, or most Earth-like plants, to grow.
—Chris Impey, The Conversation, 23 Sep. 2025
Some of the factors being considered include learning about evolution of planets, the processes that influence lunar regolith or dust, as well as objectives in fields like sun science or physical sciences.
—Elizabeth Howell, Space.com, 16 Sep. 2025
The Sun has very little of these elements present in its photosphere, but the Moon’s crust and regolith is almost exclusively composed of these heavier elements.
—Ethan Siegel, Big Think, 4 Sep. 2025
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Kaif Shaikh, Interesting Engineering, 24 Sep. 2025
Matt Damon’s character would probably not have survived on the real Mars of today, because its rocklike surface, called regolith, is too full of salts and toxic chemicals such as perchlorate for potatoes, or most Earth-like plants, to grow.
—Chris Impey, The Conversation, 23 Sep. 2025
Some of the factors being considered include learning about evolution of planets, the processes that influence lunar regolith or dust, as well as objectives in fields like sun science or physical sciences.
—Elizabeth Howell, Space.com, 16 Sep. 2025
The Sun has very little of these elements present in its photosphere, but the Moon’s crust and regolith is almost exclusively composed of these heavier elements.
—Ethan Siegel, Big Think, 4 Sep. 2025
See All Example Sentences for regolith
Cite this Entry
“Regolith.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/regolith. Accessed 28 Sep. 2025.
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