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hoarfrost n. 霜,白霜 霜,白霜 hoarfrost n 1: ice crystals forming a white deposit ( especially on objects outside) [ synonym: { frost}, { hoar}, { hoarfrost}, { rime}] Frost \ Frost\ ( fr[ o^] st; 115), n. [ OE. frost, forst, AS. forst, frost. fr. fre[' o] san to freeze; akin to D. varst, G., OHG., Icel., Dan., & Sw. frost. [ root] 18. See { Freeze}, v. i.] 1. The act of freezing; -- applied chiefly to the congelation of water; congelation of fluids. [ 1913 Webster] 2. The state or temperature of the air which occasions congelation, or the freezing of water; severe cold or freezing weather. [ 1913 Webster] The third bay comes a frost, a killing frost. -- Shak. [ 1913 Webster] 3. Frozen dew; -- called also { hoarfrost} or { white frost}. [ 1913 Webster] He scattereth the hoarfrost like ashes. -- Ps. cxlvii. 16. [ 1913 Webster] 4. Coldness or insensibility; severity or rigidity of character. [ R.] [ 1913 Webster] It was of those moments of intense feeling when the frost of the Scottish people melts like a snow wreath. -- Sir W. Scott. [ 1913 Webster] { Black frost}, cold so intense as to freeze vegetation and cause it to turn black, without the formation of hoarfrost. { Frost bearer} ( Physics), a philosophical instrument illustrating the freezing of water in a vacuum; a cryophorus. { Frost grape} ( Bot.), an American grape, with very small, acid berries. { Frost lamp}, a lamp placed below the oil tube of an Argand lamp to keep the oil limpid on cold nights; -- used especially in lighthouses. -- Knight. { Frost nail}, a nail with a sharp head driven into a horse' s shoe to keep him from slipping. { Frost smoke}, an appearance resembling smoke, caused by congelation of vapor in the atmosphere in time of severe cold. [ 1913 Webster] The brig and the ice round her are covered by a strange black obscurity: it is the frost smoke of arctic winters. -- Kane. { Frost valve}, a valve to drain the portion of a pipe, hydrant, pump, etc., where water would be liable to freeze. { Jack Frost}, a popular personification of frost. [ 1913 Webster]
Hoarfrost \ Hoar" frost`\, n. The white particles formed by the congelation of dew; white frost. [ Written also { horefrost}. See { Hoar}, a.] [ 1913 Webster] He scattereth the hoarfrost like ashes. -- Ps. cxlvii. 16. [ 1913 Webster]
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