= hemicrania, n.

Headache; spec. migraine. Also: a headache or attack of migraine. Now rare (U.S. regional and poetic).

= migraine, n.

= hemicrania, n.

Headache confined to one side of the head; megrim.

A severe headache which characteristically affects only one side of the head and is typically preceded or accompanied by visual or other…

= migraine, n.; also in phrases as a type of something useless or unhelpful.

‘strictly supra-orbital neuralgia of malarious origin.