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dry fog

noun
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Definition of dry fog

1 : a haze caused by dust or smoke in the air
2 : a fog occurring above the dew point and caused by some substance (as coal-tar vapor) that prevents evaporation of the water droplets

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“Dry fog.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/dry%20fog. Accessed 29 January 2020.

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