/keuh see"nee, kah-/ , n.
1. Oleg /oh"leg/ , ( Oleg Cassini-Loiewski ), born 1913, U.S. fashion designer and businessman, born in France.
2. a walled plain in the first quadrant of the face of the moon: about 36 miles (56 km) in diameter.
3. Geom. See oval of Cassini .