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cluster headache


from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A recurring headache similar to migraine and characterized by severe pain in the eye or temple on one side of the head, watering of the eye, and a runny nose.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An extremely painful, cyclical and unilateral headache

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a painful recurring headache associated with the release of histamine from cells


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