The Collaborative International Dictionary of English v.0.48:

Curculio \Cur*cu"li*o\ (k?r-r?"l?-?), n.; pl. Curculios (-?z).
   [L., a grain weevil.] (Zool.)
   One of a large group of beetles (Rhynchophora) of many
   genera; -- called also weevils, snout beetles,
   billbeetles, and billbugs. Many of the species are very
   destructive, as the plum curculio, the corn, grain, and rice
   weevils, etc.
   [1913 Webster]