A severe headache affecting only one side of the head, particularly referring to migraine-like pain on half of the cranium.
From Greek 'hemi-' meaning half and 'kranion' meaning skull. This medical term predates 'migraine' and was used historically to describe one-sided headaches.
Hemicrane is an old medical term that literally means 'half-skull pain'—it's the ancestor of our modern word 'migraine,' showing how doctors have long noticed that severe headaches often attack just one side of the head.
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