late 15c., from French cire "wax" (12c.), from Latin cera "wax, wax seal, wax writing tablet," related to Greek keros "beeswax," of unknown origin.
The largest asteroid and the first to be discovered, in 1801. Nearly spherical, it has a diameter of about 960 km (595 mi). The estimated total mass of all other asteroids in the asteroid belt is only about twice that of Ceres. See more at asteroid.
The Roman name for Demeter, the Greek and Roman goddess of agriculture.