Definition of magnetic needle
: a bar magnet or a set of bar magnets so suspended as to indicate the direction of the magnetic field in which it is placed
especially
: such a magnet that is slender and pointed at the ends and used as a compass
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“Magnetic needle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/magnetic%20needle. Accessed 5 May. 2021.
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