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zinfandel
zing
zinger
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zinnia
Zion
Zion National Park
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zircon
zir·con [ zúr kòn ]


noun 
Definition:
 
hard mineral containing zirconium: a very hard zirconium silicate mineral. Use: source of zirconium, gems.
[Late 18th century. < German Zirkon]
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