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Definition of: miasma
(mī·az′mə, mē-) noun plural ·mas or ·ma·ta (-mə·tə)
Polluting exhalations; the poisonous effluvium once supposed to rise from putrid matter, swamps, and marshy ground, especially at night. Also mi′asm. [<NL <Gk., pollution <miainein stain, defile]
—mi·as′mal, mi·as·mat·ic (mī′az·mat′ik), mi·as′mic adjective
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