pole star

Từ điển WordNet v3.1 - WordNet Dictionary

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, North Star, polar star, polestar
• Instance Hypernyms:
variable star, variable, lodestar, loadstar
• Member Holonyms:
Little Bear, Ursa Minor, Little Dipper, Dipper