megrim, n. [OE. migrim, migrene, F. migraine, LL. hemigrania, L. hemicrania, hemicranium, Gr. ; - half + skull. See Hemi- and Cranium, and cf. Hemicrania, Migraine.].
A kind of sick or nervous headache, usually periodical and confined to one side of the head; now more commonly called migraine headache or migraine. [1913 Webster]
A fancy; a whim; a freak; a humor; esp., in the plural, lowness of spirits. [1913 Webster]
"These are his megrims, firks, and melancholies."
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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. [1913 Webster]
megrim, n. [Etymol. uncertain.].
The British smooth sole, or scaldfish (Psetta arnoglossa). [1913 Webster]