برف دانه ،برف ريزه شيمى : دانه برف
a crystal of snow(n)
Synonyms: flake
snowflake
Hypernyms: crystal
SubstanceHolonyms: h2o
water
PartMeronyms: snow
snowfall
SubstanceHolonyms: h2o
water
PartMeronyms: snow
snowfall
PartMeronyms: snow
snowfall
SubstanceMeronyms: snow
white Arctic bunting(n)
Synonyms: plectrophenax nivalis
snow bunting
snowbird
snowflake
Hypernyms: bunting
MemberMeronyms: genus plectrophenax
plectrophenax
A snowflake is a single ice crystal that has achieved a sufficient size, and may have amalgamated with others, which falls through the Earth's atmosphere as snow. Each flake nucleates around a tiny particle in supersaturated air masses by attracting supercooled cloud water droplets, which freeze and accrete in crystal form. Complex shapes emerge as the flake moves through differing temperature and humidity zones in the atmosphere, such that individual snowflakes differ in detail from one another, but may be categorized in eight broad classifications and at least 80 individual variants. The main constituent shapes for ice crystals, from which combinations may occur, are needle, column, plate, and rime. Snow appears white in color despite being made of clear ice. This is due to diffuse reflection of the whole spectrum of light by the small crystal facets of the snowflakes.