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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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  • What is hoarfrost? - AccuWeather
    Hoarfrost can create dramatic and stunning scenes as ice needles form on objects in the wintertime, but what exactly is it and how does it form?
  • Hoarfrost | Formation, Deposition, Sublimation | Britannica
    hoarfrost, deposit of ice crystals on objects exposed to the free air, such as grass blades, tree branches, or leaves It is formed by direct condensation of water vapour to ice at temperatures below freezing and occurs when air is brought to its frost point by cooling Hoarfrost is formed by a process analogous to that by which dew is formed on similar objects, except that, in the case of dew





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