Being board-certified means that in addition to going to medical school and doing a residency in family medicine, a doctor has also passed an additional rigorous examination.
Silicosis (previously miner's phthisis, grinder's asthma, potter's rot and other occupation-related names) is a form of occupational lung disease caused by inhalation of crystalline silica dust, and is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs.
Luster Dust is sometimes used as a catch-all term for a family of decorative dusts, including petal dust, pearl dust, sparkle dust, disco dust, and highlighter dust, but these dusts are not all the same.