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单词 white spot
释义

white spotn.

Brit. /ˈwʌɪt spɒt/, U.S. /ˈ(h)waɪt ˌspɑt/
Origin: Formed within English, by compounding. Etymons: white adj., spot n.1
Etymology: < white adj. + spot n.1 With sense 1 compare scientific Latin albimacula (from 1792 as a specific name).
1. Any of several Eurasian moths having a prominent white marking on the forewing; (in later use) spec. the European noctuid Hadena albimacula.
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1766 M. Harris Aurelian 56 But whether the White Spots ever flew there in Plenty, they best know who first agreed to call it by that Name.
1832 J. Rennie Conspectus Butterflies & Moths Brit. 144 The White Spot (M[acaria] unipunctata).
1873 J. G. Wood Insects at Home 491 An example of another family..is the rare and conspicuous White-Spot (Ennychia octomaculalis).
1907 R. South Moths Brit. Isles I. 249 The White Spot (Dianthœcia albimacula). The moth shown on Plate 124, Fig. 1, is ‘The Beautiful Coronet’ of some writers.
2003 P. Waring & M. Townsend Field Guide Moths Great Brit. & Ireland 269/2 White Spot Hadena albimacula (Borkh.)... Field characters... Straight-edged central white blotch on forewing.
2. Astronomy. A distinct white area observed by telescope on the surface of a planet; (in later use) spec. such an area occurring periodically on Saturn (cf. great white spot n. at great adj., n., adv., and int. Compounds 1e) or Jupiter, now attributed to violent atmospheric disturbances.
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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
1784 W. Herschel in Philos. Trans. (Royal Soc.) 74 238 I am inclined to think, that the white spot has some little revolution, and therefore is not with its center exactly at the pole of Mars.
1807 New Encycl. XVIII. 5/1 When he [sc. Mars] turns his north pole towards the sun, it is observed to be occupied by a broad white spot.
1877 Analyst 4 41 On the Rotation of Saturn... At the time of the discovery of the white spot this determination of Herschel was not known to me.
1880 Observatory 3 654 There is a conspicuous white spot visible, just S. of the Jovian equator, which has maintained a permanency and distinctiveness of form quite unusual with these objects.
1903 Pub. Astron. Soc. Pacific 15 222 Observations of the white spot on Saturn were made with the 36-inch refractor.
1972 Jrnl. Brit. Astron. Assoc. 82 88 The white spot [on Jupiter] was in central meridian transit at 04 hrs 24 min.
2005 J. Benton Saturn & How to Observe It iv. 97 Other moderately large white spots can arise sporadically within 10° on either side of Saturn's equator.
3. More fully white spot disease. A disease affecting fish in aquariums, hatcheries, and fish farms, characterized by the development of small white spots on the skin and gills, and caused by the ciliate protozoan parasites Ichthyophthirius multifiliis (in fresh water) and Cryptocaryon irritans (in salt water).
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the world > health and disease > ill health > animal disease or disorder > disorders of fish > [noun]
fungus1880
salmon disease1880
furunculosis1912
white spot1928
columnaris1945
whirling disease1961
UDN1968
1928 Sci. Monthly Sept. 267/2 The 'itch' or 'white spot' disease, spreads very rapidly and is often the cause of a heavy mortality among young bass.
1952 G. F. Hervey & J. Hems Freshwater Trop. Aquarium Fishes vii. 77 (heading) Ichthyophthiriasis, White Spot or Ick. Cause:..The activity of the protozoan parasite, Ichthyophthirius.
2010 N.Y. Times (National ed.) 11 Jan. a11/4 There will also be fish that die later..from diseases like Ichthyophthirius multifiliis (also known as white spot disease, which makes a sick fish look as if it has been salted).
4. In South Africa under apartheid: an area occupied by white people and surrounded by areas officially designated for black occupation; esp. a white-occupied area within one of the black ‘homelands’ (homeland n. 3). Cf. black spot n. 4. Now historical.
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1952 Drum (Johannesburg) Mar. 25 (caption) Where Black Meets White: A Street Corner in the Western Areas, where a White Spot (right) adjoins a Black Spot (left).
1966 Surv. Race Rel. 1965 (S. Afr. Inst. Race Relations) 201 Smaller townships are being laid out beside ‘White spot’ towns, such as Eshowe.
1988 Cultural Survival Q. 31 Dec. 28 The large-scale relocation of blacks from farms and ‘white spots’ into the ‘homelands’.
2006 J. Benningfield Frightened Land ii. vi. 108 The struggle of the administration to segregate ownership in terms of the Land Acts led to the definition of black spots..and white spots.
This entry has been updated (OED Third Edition, March 2015; most recently modified version published online December 2021).
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n.1766
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