
1) Cranreuch 2) Frost 3) Hoar 4) Ice 5) Rime
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https://www.crosswordclues.com/clue/hoarfrost

1) Frost 2) Hoar 3) Phenomenon of a chilly dawn 4) Proof of a cold night 5) Rime 6) Water ice
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https://www.crosswordclues.com/clue/hoarfrost

A deposit of interlocking ice crystals (hoar crystals) formed by direct sublimation on objects, usually those of small diameter freely exposed to the air, such as tree branches, plant stems and leaf edges, wires, poles, etc., which surface is sufficiently cooled, mostly by nocturnal radiation, to cause the direct sublimation of the water vapor cont...
Found on
http://nsidc.org/arcticmet/glossary/hoarfrost.html

• (n.) The white particles formed by the congelation of dew; white frost.
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http://thinkexist.com/dictionary/meaning/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 ... [4 related articles]
Found on
http://www.britannica.com/eb/a-z/h/58
Hoar'frost` noun The white particles formed by the congelation of dew; white frost. [ Written also
horefrost . See
Hoar ,
adjective ] « He scattereth the
hoarfrost like ashes.»
Ps. cxlvii. 16. Found on
http://www.encyclo.co.uk/webster/H/50

a deposit of interlocking ice crystals (hoar crystals) formed by direct sublimation on objects, usually those of small diameter freely exposed to the air, such as tree branches, plant stems and leaf edges, wires, poles, etc.; the surfaces of these objects are sufficiently cooled, mostly by nocturnal radiation, to cause the direct sublimation of the...
Found on
https://nsidc.org/cryosphere/glossary?page=11

frost (def. 2).
Found on
https://www.infoplease.com/dictionary/hoarfrost
No exact match found.