Source : Webster's Revised Unabridged Dictionary (1913)

Ceres \Ce"res\, n. [L., Ceres, also corn, grain, akin to E.
   create.]
   1. (Class. Myth.) The daughter of Saturn and Ops or Rhea, the
      goddess of corn and tillage.

   2. (Actron.) The first discovered asteroid.

Source : WordNet®

Ceres
     n 1: (Roman mythology) goddess of agriculture; counterpart of
          Greek Demeter
     2: the largest asteroid and the first discovered