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单词 butterdew
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butterdew
butterdew n. Obsolete a dark greenish or yellowish-brown gelatinous substance found on damp ground, probably colonies of the cyanobacteria Nostoc (see nostoc n.).Nostoc swells up when exposed to moisture and therefore becomes more visible after wet weather. For this reason, it was formerly believed to be a type of rain or dew.Also called witches' butter.
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the world > the earth > weather and the atmosphere > weather > precipitation or atmospheric moisture > dew > [noun] > types of
night-dewa1398
May-dew?a1425
rosmarine1616
butterdew1724
mountain dew1782
1696 Philos. Trans. 1695–7 (Royal Soc.) 19 223 For a good part of last Winter and Spring, there fell in several places, a kind of thick Dew, which the Country People called Butter, from the Consistency and Colour of it.]
1724 W. Nicolson Irish Hist. Libr. 14 Bishop Ash's and Mr. Van's account of Butter-Dew, &c. 1695, 1696.
1841 Gardener's Chron. 23 Oct. 700/3 This Butterdew is probably of the same nature as that substance which in Scotland is called Witch's-butter.
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