The Collaborative International Dictionary of English v.0.48:
Dracunculus \Dra*cun"cu*lus\, n.; pl. Dracunculi. [L., dim. of draco dragon.] (Zool.) (a) A fish; the dragonet. (b) The Guinea worm (Filaria medinensis). [1913 Webster]WordNet (r) 3.0 (2006):
Dracunculus n 1: tuberous herbaceous perennials: dragon arum [syn: Dracunculus, genus Dracunculus] 2: type genus of the family Dracunculidae [syn: Dracunculus, genus Dracunculus]