reg·​o·​lith ˈre-gə-ˌlith How to pronounce regolith (audio)
: unconsolidated residual or transported material that overlies the solid rock on the earth, moon, or a planet

Examples of regolith in a Sentence

Recent Examples on the Web Past research had shown that these three crops could grow in Martian regolith, which allowed the team to focus specifically on their questions about intercropping. Sarah Kuta, Smithsonian Magazine, 6 May 2024 However, intercropping in this regolith appeared to decrease yields for the carrots and peas. Laura Baisas, Popular Science, 1 May 2024 Solar heat becomes stored in regolith below the snow and ice during the summer, and snow around a large rock will vanish as late as the fall because so much heat is still retained by the rock. Elizabeth Rayne, Ars Technica, 5 Oct. 2023 The next big hurdle was to select a sample site: a place where the spacecraft could safely fill its canister with fine grain regolith. Katrina Miller, New York Times, 25 Sep. 2023 See all Example Sentences for regolith 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'regolith.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


Greek rhēgos blanket + English -lith; akin to Greek rhezein to dye — more at raga

First Known Use

1897, in the meaning defined above

Time Traveler
The first known use of regolith was in 1897

Dictionary Entries Near regolith

Cite this Entry

“Regolith.” Dictionary, Merriam-Webster, Accessed 19 Jul. 2024.

More from Merriam-Webster on regolith

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!