(comparative more colloquial, superlative most colloquial) ( 1 linguistics) Denoting a manner of speaking or writing that is characteristic of familiar conversation; informal.  Of or pertaining to a conversation; conversational or chatty.
Cotton dust is often present in the air during cotton handling and processing. Cotton dust may contain many substances including ground-up plant matter, fiber, bacteria, fungi, soil, pesticides, non-cotton matter, and other contaminants that may have accumulated during growing, harvesting, and subsequent processing or storage periods.
Another example of harmful dust generated is flue dust, a byproduct of mining fluorine. According to the Chinese Society of Rare Earths, every ton of REE produced generates 8.5 kilograms of fluorine and 13 kilograms of flue dust, waste materials which contain the heavy metals discussed above (Schuler et al, 2011).