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regolith

[reg-uh-lith] /ˈrɛg ə lɪθ/
noun
Origin of regolith
1895-1900
1895-1900; < Greek rhêgo(s) rug, blanket + -lith
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Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for regolith

regolith

/ˈrɛɡəlɪθ/
noun
1.
the layer of loose material covering the bedrock of the earth and moon, etc, comprising soil, sand, rock fragments, volcanic ash, glacial drift, etc
Word Origin
C20: from Greek rhēgos covering, blanket + lithos stone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for regolith
n.

1897, from Greek rhegos "rug, blanket," from PIE *reg- (3) "to dye" (see raga) + lithos "stone" (see litho-).

Online Etymology Dictionary, © 2010 Douglas Harper
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regolith in Science
regolith
  (rěg'ə-lĭth')   
The layer of rock and mineral fragments that rests on bedrock and is produced by the weathering of rocks. Regolith constitutes the surface of most land.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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12
13
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