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In some news, I see the words "fine dust", but it sounds strange.

Is it a common phrase?

ex) Fine dust is in the air.

closed as off-topic by Cascabel, Drew, Glorfindel, choster, MetaEd Mar 28 '17 at 17:38

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    "Specks" is what you're looking for. – Ricky Mar 28 '17 at 1:55
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    "Powder" is another possible term, but there's no clear rule as to whether "dust" or "powder" refers to a finer material. – Hot Licks Mar 28 '17 at 1:59
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    In technical parlance, "particulates". – fixer1234 Mar 28 '17 at 3:30
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  • "Fine dust particles" is a common phrase
  • If just one dust, "a speck of dust" is a common phrase
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nanoparticles https://en.wikipedia.org/wiki/Nanoparticle are perhaps the finest non-molecular lumps.

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