a slender bar of magnetized steel frequently suspended on a low-friction installation and used in numerous instruments, especially in the magnetic compass, to point the path associated with the earth's magnetized poles.
A slender magnet suspended in a magnetic compass on a low-friction mounting; familiar with show the direction associated with planet's magnetized pole.
a slender magnet suspended in a magnetic compass on a mounting with little friction; always indicate the way of the earth's magnetic pole
a slender club of steel, magnetized and suspended at its focus on a sharp-pointed pivot, or by a delicate dietary fiber, so that it can take freely the way of magnetized meridian. It constitutes the fundamental part of a compass, for instance the mariner's and the surveyor's.