Know how to use "fewer" and "less"? Find out.
early 15c., from Latin contaminationem (nominative contaminatio), noun of action from past participle stem of contaminare (see contaminate). Figurative sense is from c.1620; specifically of radioactivity from 1913.
contamination con·tam·i·na·tion (kən-tām'ə-nā'shən)
The act or process of rendering something harmful or unsuitable.
The presence of extraneous, especially infectious, material that renders a substance or preparation impure or harmful.
in manuscript tradition, a blending whereby a single manuscript contains readings originating from different sources or different lines of tradition. In literature, contamination refers to a blending of legends or stories that results in new combinations of incident or in modifications of plot.