Source : Webster's Revised Unabridged Dictionary (1913)

Migraine \Mi*graine"\, n. [F.]
   Same as {Megrim}. -- {Mi*grain"ous}, a.

Source : WordNet®

migraine
     n : a severe recurring vascular headache; occurs more frequently
         in women than men [syn: {megrim}, {sick headache}, {hemicrania}]