- crownjewel
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crown jewel
n.
1.a. A precious stone that is part of a sovereign's regalia.b. crown jewels The jewels, such as those in a crown or scepter, used ceremonially by a sovereign.2.a. The most prized asset or possession in a group.b. A part of a company sought by another party in a hostile takeover attempt.
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Universalium. 2010.