A large cannon; specifically, the large 15th cannon at Edinburgh Castle|Edinburgh Castle]] (more usually called ‘Mons Meg’), or the cannon used to defend Londonderry during the siege of 1688-9
Magnetoencephalography An electric current produces a magnetic field Thus the electrical signals flowing in your brain create tiny magnetic fields around your head MEG is the measurement of these fields
Mons Meg An old-fashioned piece of artillery in the castle of Edinburgh, made at Mons, in Flanders It was considered a palladium by the Scotch (See Long Meg ) Sent awa' our crown, and our sword, and our sceptre, and Mons Meg to be keepit by thae English in the Tower of London [N B It was restored in 1828] - Scott: Rob Roy, chap, xxvii A roaring Meg A cannon given by the Fishmongers of London, and used in 1689 Burton says, Music is a roaring Meg against melancholy