pole-star

polestar

[pohl-stahr]
noun
2.
something that serves as a guiding principle.
3.
something that is the center of attention or attraction.

Origin:
1545–55; pole2 + star

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
polestar

noun
the brightest star in Ursa Minor; at the end of the handle of the Little Dipper; the northern axis of the earth points toward it [syn: Polaris
WordNet® 3.0, © 2006 by Princeton University.
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