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osmium Definition

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osmium
noun(os-mi-um)
a blue-gray or blue-black hard brittle very heavy polyvalent metallic element with a high melting point that is used especially as a catalyst and in hard alloys
osmium
noun(os-mi-um)
a crystalline compound OsO4 that is an oxide of osmium, has a poisonous irritating vapor, and is used as a catalyst, oxidizing agent, and biological fixative and stain

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