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| contamination |
something that contaminates; contaminant. [1/2 definitions] |
| germanium |
a tetravalent metal chemical element that has thirty-two protons in each nucleus and occurs naturally as a contaminant of coal, but can be purified for use in transistors and as a component of high-quality optical glass. (symbol: Ge) |
| pollutant |
something that pollutes, esp. a waste substance that makes air, water, or land impure or unhealthy; contaminant. |
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