megrim
A headache; a migraine.
archaic
A fancy, a whim, a caprice.
archaic
See megrims (“depression; any of various diseases of animals”).
For quotations using this term, see Citations:megrim.
Where it comes from
Borrowed from Middle French migraigne, semi-learned borrowing from Late Latin hēmicrānia (“pain in one half of the head”), from Ancient Greek ἡμικρᾱνίᾰ (hēmikrāníă), from ἡμι- (hēmi-, “hemi-, half”) + κρανίον (kraníon, “skull”) (whence also English cranium). Doublet of migraine and hemicrania.
Adapted from the Wiktionary entry megrim (CC BY-SA 4.0).