The Collaborative International Dictionary of English v.0.48:
Megrim \Me"grim\, n. [OE. migrim, migrene, F. migraine, LL.
hemigrania, L. hemicrania, hemicranium, Gr. ?; ?- half + ?
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; now more commonly called
migraine headache or migraine.
[1913 Webster +PJC]
2. A fancy; a whim; a freak; a humor; esp., in the plural,
lowness of spirits.
[1913 Webster]
These are his megrims, firks, and melancholies.
--Ford.
[1913 Webster]
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.
[1913 Webster]
The Collaborative International Dictionary of English v.0.48:
migraine \mi*graine"\, n. [F. migraine, LL. hemigrania, L.
hemicrania, hemicranium, Gr. "hmikrani`a; "hmi- half +
krani`on skull. See Hemi- and Cranium, and cf.
Hemicrania, Migraine.]
1. A kind of intense sick or nervous headache, usually
periodical and confined to one side of the head; called
also migraine headache. Same as megrim. --
Mi*grain"ous, a.
[1913 Webster]