megrim

noun3

1. •
   A flatfish of the genus Lepidorhombus native to the northeastern Atlantic Ocean; specifically, a Cornish sole, sail-fluke, witch or whiff (Lepidorhombus whiffiagonis).
2. •
   (no longer used) A headache; a migraine.
3. •
   (no longer used) A fancy, a whim, a caprice.