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Cluny lace
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cluster B personality
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cluster headache
clus·ter head·ache (plural clus·ter head·aches)


noun 
Definition:
 
recurring headache: a severe recurring headache associated with the release of histamine in the bloodstream, and marked by sudden sharp pain behind one eye or nostril
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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