magnetic needle

Noun
  1. A slender magnet suspended in a magnetic compass on a mounting with little friction;
    Used to indicate the direction of the earth's magnetic pole (synset 103712911)
    is a type of: magnet - (physics) a device that attracts iron and produces a magnetic field
    is a part of: magnetic compass - compass based on an indicator (as a magnetic needle) that points to the magnetic north

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