(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.
Environmental tobacco smoke is a contributor of air pollution particles. These fine particles are a risk factor for chronic lung disease which can be debilitating and sometimes fatal. They can lead to conditions such as asthma, bronchitis, and emphysema, and are also a risk for lung cancer, write the researchers. The test was conducted in the small, northern Italian mountain town of Chiavenna, which has unusually low outdoor levels of air pollution.