(n) A regional or social variety of a language distinguished by pronunciation, grammar, or vocabulary, especially a variety of speech differing from the standard literary language or speech pattern of the culture in which it exists: Cockney is a dialect of English.
There was a 4 mm nodular opacity in the right lower lung. A ct scan of 10/06 showed linear scarring in both lungs but no mention of nodules. A chest xray in 4/2007 showed a round density in the right perihilar region.
Definition and Visual Determination of Opacity . Method 9 . With regards to stack emissions, opacity is the degree to which visibility of a background (i.e., blue sky) is reduced by particulates (smoke). The EPA Method 9 Opacity Observation Form, provided in Appendix A, is the enforceable monitoring record which evaluates the quantitative 20% opacity limit.