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Noun: headache  'hed,eyk
  1. Something or someone that causes anxiety; a source of unhappiness
    "New York traffic is a constant headache";
    - concern, worry, vexation
     
  2. Pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs
    - head ache, cephalalgia

Derived forms: head aches, headaches

Type of: ache, aching, negative stimulus

Encyclopedia: Headache Headache, cluster

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