magnetic needle

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Definitions from WordNet

Noun magnetic needle has 1 sense

magnetic needle - 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
--₁ is a kind of magnet
--₁ is a part of magnetic compass

Definitions from the Web

Magnetic Needle

Definition: A small, slender needle made of magnetizable material that aligns itself with the Earth's magnetic field and is used in compasses and navigational instruments.

Senses:

Noun - Geology: A natural magnetized needle found in rocks, which aligns with the Earth's magnetic field at the time of its formation.
Noun - Compass: A needle, often marked with the cardinal points, that is suspended or pivoted to move freely on a supporting surface, used for indicating the direction of magnetic north.

Examples:

Noun - Geology: The scientist discovered a magnetic needle while studying the ancient rock formations.
Noun - Compass: The hiker relied on his compass with a magnetic needle to navigate through the dense forest.

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