Definition of Ursa Minor
a northern constellation (the Little Bear) that contains the north celestial pole and the polar star Polaris. The brightest stars form a shape that is also known as the Little Dipper.
(as genitive Ursae Minoris
/ˈərsē miˈnôris/) used with a preceding letter or numeral to designate a star in this constellation:the star Alpha Ursae Minoris