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Webster 1913 Edition
Rhea
Rhe′a
,Noun.
[L., a proper name.]
(Zool.)
Any one of three species of large South American ostrichlike birds of the genera
Rhea
and Pterocnemia
. Called also the American ostrich
. ☞ The common rhea, or nandou (
Rhea Americana
), ranges from Brazil to Patagonia. Darwin’s rhea (Pterocnemia Darwinii
), of Patagonia, is smaller, and has the legs feathered below the knee.