regolithn.

Brit.

/ˈrɛɡəlɪθ/, U.S.

/ˈrɛɡəˌlɪθ/

Forms: 1800s– regolith, 1900s– rhegolith (rare).

Origin: A borrowing from Greek, combined with an English element. Etymons: Greek ῥῆγος , -lith comb. form.

Etymology: < ancient Greek ῥῆγος rug, blanket ( < the stem of ῥέζειν to dye ( < the same Indo-European base as Sanskrit rañj- to become coloured, reddened: see raga n.), with lengthened vowel) + -lith comb. form.

1. Geology. The unconsolidated weathered material covering the solid bedrock of the earth, comprising rock fragments, mineral grains, and other superficial deposits; the soil.

ΘΚΠ

the world > the universe > planet > [noun] > part of planet

terminator1661

belt1665

fascia1704

fibre1715

white spot1784

dayside1827

nightside1848

albedo1860

north pole1861

polar cap1863

core1882

regolith1897

tectonics1899

sediment ring1955

radiation belt1958

palaeo-radius1960

space needle1961

soil1967

1897 G. P. Merrill Treat. Rocks v. i. 299 This entire mantle of unconsolidated material, whatever its nature or origin, it is proposed to call the regolith, from the Greek words ῥῆγος, meaning a blanket, and λιθος, a stone.

1922 C. C. Williams Design Masonry Struct. & Found. xiii. 432 The earth consists of various rock formations covered with a mantle of unconsolidated products of rock disintegration, called the regolith, or more commonly, the soil.

1949 F. J. Pettijohn Sedimentary Rocks ix. 282 Residual soils (regolith of Merrill, saprolith of Becker, and sathrolith of Sederholm) are the products of weathering formed in situ.

1995 Guardian 12 Oct. (OnLine section) 12/4 In the top metre of the regolith, it's estimated that there is enough helium-3 to satisfy our energy needs for a thousand years.

2007 Brit. Archaeol. Sept.–Oct. 9/1 The axe makers were aiming not for solid rock, but axe-sized chunks in the regolith, material churned up by former glacial action.

2. Astronomy. Unconsolidated dust and broken rock covering the solid bedrock of the moon, another planet, or an asteroid, formed (partly) from the debris of meteorite impacts.

ΚΠ

1967 E. M. Shoemaker et al. in Science 3 Nov. 651/2 A clearer picture of the subsurface structure of the lunar surface debris layer of regolith has thus emerged.

1976 J. Kleczek Universe iv. 155 The solid lunar globe is covered by a layer of loose broken rock material called regolith.

1992 B. Bova Mars (1993) 27 Mustn't call it soil... Soil is alive with microorganisms and earthworms and other living creatures. Here on Mars it's called regolith.

1992 K. S. Robinson Red Mars (1993) iii. 103 The regolith was an agricultural nightmare..completely without biomass.

2004 Gold Coast Bull. (Austral.) (Nexis) 29 Apr. Airless bodies such as the moon, Mercury, and asteroids have an inorganic soil made of crushed rocks called regolith.

Derivatives

regoˈlithic adj.

ΘΚΠ

the world > the universe > planet > [adjective] > part

regolithic1897

dayside1935

tectonical1939

1897 G. P. Merrill Treat. Rocks v. i. 303 The regolithic material overlying the Lower Silurian and Cambrian limestones.

1955 Trans. Royal Soc. N.Z. 82 1015 Arrested streams or sheets..of formerly regolithic debris now forming deposits of head on slopes.

2007 M. E. Lipschutz & L. Schultz in L.-A. McFadden et al. Encycl. Solar Syst. (ed. 2) xiii. 255/1 Some meteorites contain regolithic material bombarded by very energetic particles.

This entry has been updated (OED Third Edition, December 2009; most recently modified version published online March 2022).

单词	regolith
释义	regolithn. Brit. /ˈrɛɡəlɪθ/, U.S. /ˈrɛɡəˌlɪθ/ Forms: 1800s– regolith, 1900s– rhegolith (rare). Origin: A borrowing from Greek, combined with an English element. Etymons: Greek ῥῆγος , -lith comb. form. Etymology: < ancient Greek ῥῆγος rug, blanket ( < the stem of ῥέζειν to dye ( < the same Indo-European base as Sanskrit rañj- to become coloured, reddened: see raga n.), with lengthened vowel) + -lith comb. form. 1. Geology. The unconsolidated weathered material covering the solid bedrock of the earth, comprising rock fragments, mineral grains, and other superficial deposits; the soil. ΘΚΠ the world > the universe > planet > [noun] > part of planet terminator1661 belt1665 fascia1704 fibre1715 white spot1784 dayside1827 nightside1848 albedo1860 north pole1861 polar cap1863 core1882 regolith1897 tectonics1899 sediment ring1955 radiation belt1958 palaeo-radius1960 space needle1961 soil1967 1897 G. P. Merrill Treat. Rocks v. i. 299 This entire mantle of unconsolidated material, whatever its nature or origin, it is proposed to call the regolith, from the Greek words ῥῆγος, meaning a blanket, and λιθος, a stone. 1922 C. C. Williams Design Masonry Struct. & Found. xiii. 432 The earth consists of various rock formations covered with a mantle of unconsolidated products of rock disintegration, called the regolith, or more commonly, the soil. 1949 F. J. Pettijohn Sedimentary Rocks ix. 282 Residual soils (regolith of Merrill, saprolith of Becker, and sathrolith of Sederholm) are the products of weathering formed in situ. 1995 Guardian 12 Oct. (OnLine section) 12/4 In the top metre of the regolith, it's estimated that there is enough helium-3 to satisfy our energy needs for a thousand years. 2007 Brit. Archaeol. Sept.–Oct. 9/1 The axe makers were aiming not for solid rock, but axe-sized chunks in the regolith, material churned up by former glacial action. 2. Astronomy. Unconsolidated dust and broken rock covering the solid bedrock of the moon, another planet, or an asteroid, formed (partly) from the debris of meteorite impacts. ΚΠ 1967 E. M. Shoemaker et al. in Science 3 Nov. 651/2 A clearer picture of the subsurface structure of the lunar surface debris layer of regolith has thus emerged. 1976 J. Kleczek Universe iv. 155 The solid lunar globe is covered by a layer of loose broken rock material called regolith. 1992 B. Bova Mars (1993) 27 Mustn't call it soil... Soil is alive with microorganisms and earthworms and other living creatures. Here on Mars it's called regolith. 1992 K. S. Robinson Red Mars (1993) iii. 103 The regolith was an agricultural nightmare..completely without biomass. 2004 Gold Coast Bull. (Austral.) (Nexis) 29 Apr. Airless bodies such as the moon, Mercury, and asteroids have an inorganic soil made of crushed rocks called regolith. Derivatives regoˈlithic adj. ΘΚΠ the world > the universe > planet > [adjective] > part regolithic1897 dayside1935 tectonical1939 1897 G. P. Merrill Treat. Rocks v. i. 303 The regolithic material overlying the Lower Silurian and Cambrian limestones. 1955 Trans. Royal Soc. N.Z. 82 1015 Arrested streams or sheets..of formerly regolithic debris now forming deposits of head on slopes. 2007 M. E. Lipschutz & L. Schultz in L.-A. McFadden et al. Encycl. Solar Syst. (ed. 2) xiii. 255/1 Some meteorites contain regolithic material bombarded by very energetic particles. This entry has been updated (OED Third Edition, December 2009; most recently modified version published online March 2022). < n.1897
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