(κυνόσουρα, dog's tail), in Astronomy, the Cynosure, name given by the Greeks to Ursa Minor, the little bear. This constellation is near the north pole, and consists of seven stars, four of which are disposed like the four wheels of a chariot, and three lengthwise like the beam; hence it is sometimes called the Chariot, or Charles's Wain.

As seamen are accustomed to steer by this constellation, cynosure is sometimes taken for that which directs or attracts attention.

CYNTHIA and CYNTHUS, in Mythology, surnames respectively of Diana and Apollo; derived from Mount Cythus, in the island of Delos, their birthplace.