residual dose contamination

re·sid·u·al dose con·tam·i·na·tion

(rē-zid'yū-ăl dōs kŏn-tam'i-nā'shŭn)
That portion of a chemical, biologic, or radiologic agent that remains on (external contamination) or in (internal contamination) a victim or inanimate object, especially (but not necessarily) after evaporation and absorption.
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