Me″grim (?), n. [OE. migrim, migrene, F. migraine, LL. hemigrania, L. hemicrania, hemicranium, Gr. ημικρανἵα; ημἱ- half + κρανίον skull. See Hemi- and Cranium, and cf. Hemicrania, Migraine.] 1. A kind of sick or nervous headache, usually periodical and confined to one side of the head.
2. A fancy; a whim; a freak; a humor; esp., in the plural, lowness of spirits.
These are his megrims, firks, and melancholies. Ford.
3. pl.(Far.) A sudden vertigo in a horse, succeeded sometimes by unconsciousness, produced by an excess of blood in the brain; a mild form of apoplexy. Youatt.