smut fungus

(obsolete) shoddy made by a machine called the devil

plural of loggerhead duck

The blackhead duck of the United States.

plural of raft duck

plural of fluffy duck

(graph theory) A graph derived from some plane graph in such a way that the derived graph has a vertex corresponding to each face of the given graph, an edge corresponding to each edge of the given graph that is shared by a pair of distinct faces, and a self-loop for each edge of the given graph that is a border of the same face on both of its sides.

Oxyura leucocephala, an arctic sea bird in the family Anatidae

The sheldrake or bergander.

plural of burrow duck