Definition of regolith
: unconsolidated residual or transported material that overlies the solid rock on the earth, moon, or a planet
Origin of regolith
Greek rhēgos blanket + English -lith; akin to Greek rhezein to dye — more at raga
First Known Use: 1897
Learn More about regolith
Britannica.com: Encyclopedia article about "regolith"
Seen and Heard
What made you want to look up regolith? Please tell us where you read or heard it (including the quote, if possible).