atmospheric impurity

atmospheric impurity

[¦at·mə¦sfir·ik im′pyür·əd·ē]
(engineering)
An extraneous substance that is mixed as a contaminant with the air of the atmosphere.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
He therefore underlined the causal significance of the circumstances that caused or aggravated disease ("atmospheric impurities..., damp and filth, and close and overcrowded dwellings") and urged that these be removed by "drainage, proper cleansing, better ventilation and other means of diminishing atmospheric impurity" (6).
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