Dipping needle


Also found in: Wikipedia.
a magnetic needle suspended at its center of gravity, and moving freely in a vertical plane, so as to indicate on a graduated circle the magnetic dip or inclination.
See under Dipping.

See also: Dipping, Needle

References in periodicals archive ?
Ronald's black bag contains two essential tools - a pelorus, for taking bearings, and a dipping needle, for measuring magnetic fields.