From WordNet (r) 2.0 (August 2003) [wn]:
Ceres
n 1: (Roman mythology) goddess of agriculture; counterpart of
Greek Demeter [syn: Ceres]
2: the largest asteroid and the first discovered [syn: Ceres]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
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.
[1913 Webster]
2. (Actron.) The first discovered asteroid.
[1913 Webster]