magnetic needle

Example Sentences

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Finding the magnetoreceptors responsible for triggering these neurons has been like looking for a magnetic needle in a haystack.

From Science Magazine • Jun. 23, 2016

Last week Bendix Aviation Corp. announced a new automatic compass that makes the old magnetic needle* look as obsolete as a warrior's spear.

From Time Magazine Archive

He said: "Nothing must deflect the magnetic needle."

From Time Magazine Archive

Astatic, a-stat′ik, adj. having a tendency not to stand still: losing polarity, as a magnetic needle.

From Chambers's Twentieth Century Dictionary (part 1 of 4: A-D) by Various

The form of magnetic needle illustrated in fig.

From Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications by Hawkins, Nehemiah