Buffel duck \Buf"fel duck\ (b[u^]f"f[e^]l d[u^]k`). [See
{Buffalo}.] (Zool.)
A small duck ({Charitonetta albeola}); the spirit duck, or
butterball. The head of the male is covered with numerous
elongated feathers, and thus appears large. Called also
{bufflehead}.
[1913 Webster]