anodon

from The Century Dictionary.

• noun Same as Anodonta.
• noun In herpetology, a genus of African serpents, of the family Dasypeltidœ or Rhachiodontidœ, which have no grooved maxillary teeth. Also called Diodon, Rhachiodon, and Dasypeltis.
• noun In entomology, a genus of coleopterous insects.
• noun [lowercase] [⟨ anodont.] A fresh-water mussel of the genus Anodonta (which see).
• noun [lowercase] A snake of the genus Dasypeltis: as, the rough anodon, Dasypeltis scabra.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) A genus of fresh-water bivalves, having no teeth at the hinge.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun zoology Any of the genus Anodon, now Anondonta of freshwater bivalves.