noun : CO
Source: WordNet 3.1
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1. (
) an odorless very poisonous gas that is a product of incomplete combustion of carbon ;
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2. (
) a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition ;
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3. (
) one who refuses to serve in the armed forces on grounds of conscience ;
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4. (
) a state in west central United States in the Rocky Mountains ;
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