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magnetic compass |
Also found in: Dictionary/thesaurus, Hutchinson | 0.04 sec. |
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magnetic compass [mag′ned·ik ′käm·pəs] (navigation) A compass depending for its directive force upon the attraction of the horizontal component of the earth's magnetic field for a magnetized needle or sensing element free to turn with a minimum of friction in any horizontal direction. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Birds' magnetic compasses seem to break down in red light," Gautreaux notes, citing others' laboratory research. While magnetic compasses of the future still will indicate which way is north or south and up or down, a new Xerox discovery means that they could also be made smaller than a human hair. Built-in magnetic compasses may orient monarch butterflies during their mind-boggling, southwestern migration, according to new experiments in Kansas. |
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