First Known Use: 1897
Dictionary
regolith
noun reg·o·lith \ˈre-gə-ˌlith\
Definition of REGOLITH
: unconsolidated residual or transported material that overlies the solid rock on the earth, moon, or a planet
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Origin of REGOLITH
Greek rhēgos blanket + English -lith; akin to Greek rhezein to dye — more at raga
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