Agonic Lines 

"Agonic lines, ascendances and amatory tendencies,
From here to heart arrhythmias
Oh don't you know we're not like this."

Agonic lines are an imaginary line on the Earth's surface, connecting points where the magnetic declination is zero. The agonic line is a line of longitude on which a compass will show true north, since where magnetic declination is zero, magnetic north coincides with geographic north.