Injurious; harmful. [L. noxius, injurious, fr. noceo, to injure]
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nox·ious 'näk-shəs adj physically harmful or destructive to living beings <\noxious wastes>
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nox·ious (nokґshəs) [L. noxius] hurtful, pernicious, or damaging to tissue.Medical dictionary. 2011.