noun the british smooth sole, or scaldfish (psetta arnoglossa).
2. megrim ·noun a fancy; a whim; a freak; a humor; ·esp., in the plural, lowness of spirits.
3. megrim ·noun a kind of sick or nevrous headache, usually periodical and confined to one side of the head.
4. megrim ·noun a sudden vertigo in a horse, succeeded sometimes by unconsciousness, produced by an excess of blood in the brain; a mild form of apoplexy.