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zirconium

zir·co·ni·um

zirconium

 
pronunciation:
zr ko ni m
features:
Word Combinations (noun)
part of speech: noun
definition: a chemical element that has forty protons in each nucleus and that is found principally in zircon, a crystalline silicate compound, but that can be isolated as a solid metal that is used extensively in nuclear reactors because it allows neutrons to pass through without significant resistance. (symbol: Zr)
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derivation: zirconic (adj.)