| dreissena | (n) zebra mussels, Syn. genus Dreissena |
| zebra mussel | (n) inch long mollusk imported accidentally from Europe; clogs utility inlet pipes and feeds on edible freshwater mussels, Syn. Dreissena polymorpha |
| Dreissena | ‖prop. n. [ NL. Named after Dreyssen, a Belgian physician. ] (Zool.) A genus of bivalve shells of which one species (Dreissena polymorpha) is often so abundant as to be very troublesome in the fresh waters of Europe. [ 1913 Webster ] |
| dreissena | (n) zebra mussels, Syn. genus Dreissena |
| zebra mussel | (n) inch long mollusk imported accidentally from Europe; clogs utility inlet pipes and feeds on edible freshwater mussels, Syn. Dreissena polymorpha |
| Dreissena | ‖prop. n. [ NL. Named after Dreyssen, a Belgian physician. ] (Zool.) A genus of bivalve shells of which one species (Dreissena polymorpha) is often so abundant as to be very troublesome in the fresh waters of Europe. [ 1913 Webster ] |