outwashn.

Brit.

/ˈaʊtwɒʃ/, U.S.

/ˈaʊtˌwɔʃ/,

/ˈaʊtˌwɑʃ/

Origin: Formed within English, by derivation. Etymons: out- prefix, wash n.

Etymology: < out- prefix + wash n. Compare to wash out (see wash v. 15).

1. Physical Geography.

a. The washing of material out of a soil or deposit by the action of water; spec. the carrying of material out from a glacier by meltwater.

ΘΚΠ

the world > the earth > structure of the earth > formation of features > glaciation > [noun] > specific processes

grooving1877

outwash1884

ice-scouring1888

plucking1893

ice scour1899

sapping1899

nivation1900

transfluence1949

1884 Overland Monthly Aug. 130/1 I have explored its course, its character, its fossil remains, as evidenced in places where there has been an outwash occasioned by the modern streams.

1905 Bot. Gaz. 40 268 (caption) Profile through B, map, showing influence of plant associations in preventing the outwash of soil.

1916 Sci. Monthly Apr. 322 The sediments [are]..supplied either by calcareous overwash from the reef, by organic deposits within the lagoon itself, or by outwash from the island streams.

1957 J. K. Charlesworth Quaternary Era I. xxii. 442 Thus outwash may occur with or without moraines.

1994 Jrnl. Hydrol. 160 71 Frequently occurring acid episodes caused by rainstorms and associated outwash of organic acids from forest soils are typical for events in late summer and autumn.

b. The material carried out from a glacier by meltwater and deposited beyond the terminal moraine (chiefly sand and gravel, or, further away, silt and clay); a deposit formed by this.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > sediment or alluvium > [noun] > glacial

bottom moraine1852

overwash1886

kettle moraine1889

outwash1905

1905 Jrnl. Geol. (Chicago) 13 245 One of the pronounced features of the outwash is the pitted-plain development.

1916 Bull. Torrey Bot. Club 43 237 Ravines in glacial till and outwash have been developed since the retreat of the glaciers.

1971 R. F. Flint Glacial & Quaternary Geol. vii. 187 In the downstream direction, outwash is diluted by an ever-increasing proportion of nonglacial alluvium derived through tributary streams that did not originate in glaciers.

1991 Nature Canada Fall 23/2 There is also evidence the reptiles have an affinity for light soils—sand and gravel outwashes and shorelands.

2. More generally: the washing or flowing of water, etc., outwards. Also in extended use. rare.

ΚΠ

1892 National Rev. Sept. 118 A most sweet call penetrated the uproar. The Call filled it, drained through it, wrapped it, overcame it; so that it sank away at last like the outwash of an exhausted tide.

1970 G. Dickson Hour of Horde ix. 110 The bearlike alien's face opened in a grimace that would never have been recognizable as a smile if the outwash of emotion from the other had not confirmed that a smile was intended.

1997 Proc. National Acad. Sci. U.S.A. 94 14829/2 Arteriolar vasodilatation causes an outwash of the increased HbR produced by the increased oxygen consumption.

Compounds

General attributive (in sense 1), as outwash gravel, outwash plain, etc.

ΚΠ

1894 T. C. Chamberlin in Jrnl. Geol. (Chicago) 2 533 There were, however, tracts of assorted material formed by waters outflowing from the ice where no definite terminal ridging took place. Such forms may be designated outwash aprons in distinction from overwash aprons.

1908 Amer. Jrnl. Sci. 175 108 The river terraces of outwash gravel.

1934 Antiquity 8 306 The retreat of the ice and the formation of the outwash plain in front of the moraine.

1972 J. G. Cruickshank Soil Geogr. ii. 59 Outwash alluvium is usually similar in texture, but may include some fine debris where the melt water has spread over a large area.

1999 W. L. Heat Moon River Horse xi. 449 Nor could we see how the Blue Mountains to westward descend toward the Snake as an outwash slope opening to the great Columbia Plateau.

This entry has been updated (OED Third Edition, December 2004; most recently modified version published online March 2022).

单词	outwash
释义	outwashn. Brit. /ˈaʊtwɒʃ/, U.S. /ˈaʊtˌwɔʃ/, /ˈaʊtˌwɑʃ/ Origin: Formed within English, by derivation. Etymons: out- prefix, wash n. Etymology: < out- prefix + wash n. Compare to wash out (see wash v. 15). 1. Physical Geography. a. The washing of material out of a soil or deposit by the action of water; spec. the carrying of material out from a glacier by meltwater. ΘΚΠ the world > the earth > structure of the earth > formation of features > glaciation > [noun] > specific processes grooving1877 outwash1884 ice-scouring1888 plucking1893 ice scour1899 sapping1899 nivation1900 transfluence1949 1884 Overland Monthly Aug. 130/1 I have explored its course, its character, its fossil remains, as evidenced in places where there has been an outwash occasioned by the modern streams. 1905 Bot. Gaz. 40 268 (caption) Profile through B, map, showing influence of plant associations in preventing the outwash of soil. 1916 Sci. Monthly Apr. 322 The sediments [are]..supplied either by calcareous overwash from the reef, by organic deposits within the lagoon itself, or by outwash from the island streams. 1957 J. K. Charlesworth Quaternary Era I. xxii. 442 Thus outwash may occur with or without moraines. 1994 Jrnl. Hydrol. 160 71 Frequently occurring acid episodes caused by rainstorms and associated outwash of organic acids from forest soils are typical for events in late summer and autumn. b. The material carried out from a glacier by meltwater and deposited beyond the terminal moraine (chiefly sand and gravel, or, further away, silt and clay); a deposit formed by this. ΘΚΠ the world > the earth > structure of the earth > constituent materials > sediment or alluvium > [noun] > glacial bottom moraine1852 overwash1886 kettle moraine1889 outwash1905 1905 Jrnl. Geol. (Chicago) 13 245 One of the pronounced features of the outwash is the pitted-plain development. 1916 Bull. Torrey Bot. Club 43 237 Ravines in glacial till and outwash have been developed since the retreat of the glaciers. 1971 R. F. Flint Glacial & Quaternary Geol. vii. 187 In the downstream direction, outwash is diluted by an ever-increasing proportion of nonglacial alluvium derived through tributary streams that did not originate in glaciers. 1991 Nature Canada Fall 23/2 There is also evidence the reptiles have an affinity for light soils—sand and gravel outwashes and shorelands. 2. More generally: the washing or flowing of water, etc., outwards. Also in extended use. rare. ΚΠ 1892 National Rev. Sept. 118 A most sweet call penetrated the uproar. The Call filled it, drained through it, wrapped it, overcame it; so that it sank away at last like the outwash of an exhausted tide. 1970 G. Dickson Hour of Horde ix. 110 The bearlike alien's face opened in a grimace that would never have been recognizable as a smile if the outwash of emotion from the other had not confirmed that a smile was intended. 1997 Proc. National Acad. Sci. U.S.A. 94 14829/2 Arteriolar vasodilatation causes an outwash of the increased HbR produced by the increased oxygen consumption. Compounds General attributive (in sense 1), as outwash gravel, outwash plain, etc. ΚΠ 1894 T. C. Chamberlin in Jrnl. Geol. (Chicago) 2 533 There were, however, tracts of assorted material formed by waters outflowing from the ice where no definite terminal ridging took place. Such forms may be designated outwash aprons in distinction from overwash aprons. 1908 Amer. Jrnl. Sci. 175 108 The river terraces of outwash gravel. 1934 Antiquity 8 306 The retreat of the ice and the formation of the outwash plain in front of the moraine. 1972 J. G. Cruickshank Soil Geogr. ii. 59 Outwash alluvium is usually similar in texture, but may include some fine debris where the melt water has spread over a large area. 1999 W. L. Heat Moon River Horse xi. 449 Nor could we see how the Blue Mountains to westward descend toward the Snake as an outwash slope opening to the great Columbia Plateau. This entry has been updated (OED Third Edition, December 2004; most recently modified version published online March 2022). < n.1884
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