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regolith (n.)
[regolith 词源字典]
1897, from Greek
rhegos
"rug, blanket," from PIE
*reg-
(3) "to dye" (see
raga
) +
lithos
"stone" (see
litho-
).
[regolith etymology, regolith origin, 英语词源]
[regolith 词源字典]