magnetic needle


  • WordNet 3.6
    • n 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
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Webster's Revised Unabridged Dictionary
    • Magnetic needle a slender bar of steel, magnetized and suspended at its center on a sharp-pointed pivot, or by a delicate fiber, so that it may take freely the direction of the magnetic meridian. It constitutes the essential part of a compass, such as the mariner's and the surveyor's.
    • ***
Chambers's Twentieth Century Dictionary
    • Magnetic needle the light bar in the mariner's compass which, because it is magnetised, points always to the north
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Chambers's Twentieth Century Dictionary
Through O. Fr., from L. magnes, a magnet—Gr. magnēs=Magnesian stone, from Magnēsia, in Lydia or Thessaly.


In literature:

Well, that makes a magnet of it, and the suspended needle, being attracted, sticks to it.
"The Battery and the Boiler" by R.M. Ballantyne
He played red or black, and the ball followed his color as the needle follows the magnet.
"Peak and Prairie" by Anna Fuller
Beans and needles and tacks and a magnet.
"The Book of the Damned" by Charles Fort
My men, who had no faith whatever in the magnetic needle, were again almost paralysed with fear that we might not encounter the stream again.
"Across Unknown South America" by Arnold Henry Savage Landor
Then, when the needle was still, he brought up the middle of the magnet very near to the needle; but it did not move towards it at all.
"Rollo's Experiments" by Jacob Abbott
Her idea had been to be a magnet, and magnets keep quite still; needles do all the moving.
"The Dark Tower" by Phyllis Bottome
Magnetize a needle by drawing one of the poles of the magnet from end to end of the needle, always in the same direction, about twenty times.
"Ontario Teachers' Manuals: Nature Study" by Ontario Ministry of Education
And still, as the needle is drawn by the magnet, here he was, in Bellaggio.
"The Place of Honeymoons" by Harold MacGrath
The magnetic needle was apparently describing a semicircle.
"The Submarine Hunters" by Percy F. Westerman
Draw a meridian on the sheet parallel to the position of the magnetic needle.
"Manual of Military Training" by James A. Moss
Wheatstone and Cooke invented the magnetic needle telegraph.
"A History of the Nineteenth Century, Year by Year" by Edwin Emerson
Magnetic needle, influence of current on, 129.
"How it Works" by Archibald Williams
"Common Science" by Carleton W. Washburne
It is, or seems to be, a consciousness of direction that is as unerring as the magnetic needle.
"Ways of Nature" by John Burroughs
Experiments with the Effects of the Electric Current on the Magnetic Needle, published at Berlin, 1816.
"A History of Science, Volume 5(of 5)" by Henry Smith Williams
O, O, Magnetic needles.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 7" by Various
But now I am going to hold this magnet up, and bring the needle close to the magnet.
"With the Children on Sunday" by Sylvanus Stall
I secured a number of fragments, which I still possess, and which act forcibly upon a magnetic needle.
"The Glaciers of the Alps" by John Tyndall
It is well known that one pole of a magnetic needle points to the north and the other to the south.
"Electricity and Magnetism" by Elisha Gray
Moreover, he found that a magnetic needle hung near the tube was deflected as if held near an electric current.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2" by Various

In poetry:

As needles point towards the pole,
When touched by the magnetic stone;
So faith in Jesus, gives the soul
A tendency before unknown.
"The Lodestone" by John Newton

In news:

Palmetto Health emergency physician designed a device that combines ultrasound and magnetics to help guide insertion of needles into deep tissue.
Magnetic Jet Injection Device Can Shoot Any Drug Through the Skin, No Needle Required.
How needles and magnets helped one new mom get her body back.

In science:

The precipitation is carried out in a magnetic field, and needle like magnetic particles are oriented with their long axis parallel to the field direction.
Random Field Ising Model
The gravitomagnetic field generates frame-dragging of a gyroscope in a way formally similar to the magnetic field producing a change of orientation of a magnetic needle (magnetic dipole).
Lunar Laser Ranging, Gravitomagnetism and Frame-Dragging
The mirror and magnets are suspended using a flexible beryllium copper membrane. A needle pushes up against a jewel bearing mounted at the center of the mirror to hold the focus constant.
SAOLIM, a prototype of a low cost System for Adaptive Optics with Lucky Imaging