n.
A severe recurring headache, usually affecting only one side of the head, characterized by sharp pain and often accompanied by nausea, vomiting, and visual disturbances. Also called megrim.
[Middle English, from Old French, from Late Latin hēmicrānia, from Greek hēmikrāniā : hēmi-, hemi- + krānion, head.]
migrainous mi·grain'ous adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
