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zirconium
noun
a hard, ductile, gray or black, metallic chemical element found combined in zircon, etc., and used in alloys, ceramics, the cladding for nuclear fuel in reactors, etc.: symbol, Zr; at. no., 40
see the periodic table of elements in the Reference Supplement
Related Forms:
- zirconic adjective
See zirconium in American Heritage Dictionary 4
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