Nandou \Nan"dou\, Nandu \Nan"du\, n. [Braz. nhandu or yandu.]
(Zool.)
Any one of three species of South American ostriches of the
genera {Rhea} and {Pterocnemia}, especially the smallest,
{Pterocnemia pennata} (formerly {Rhea Americana}), called
also the {common rhea}. They are tall fast-running flightless
birds similar to ostriches but three-toed, found from Peru to
the Straits of Magellan. See {Rhea}. [Written also {nandow}.]
[1913 Webster + WordNet 1.5]