The Collaborative International Dictionary
Pygopodous
Pygopodous \Py*gop"o*dous\, a. (Zo["o]l.) Of or pertaining to the Pygopodes.
Wiktionary
pygopodous
a. (context zoology English) Of or pertaining to the former (taxlink Pygopodes genus noshow=1) genus of aquatic birds that have the legs placed far back on the body.