CAPYBARA
capybara, capibara, Hydrochoerus hydrochaeris
(noun) pig-sized tailless South American amphibious rodent with partly webbed feet; largest living rodent
Source: WordNet® 3.1
Etymology
Noun
capybara (plural capybaras)
A semi-aquatic South American rodent, Hydrochoerus hydrochaeris, the largest living rodent.
Source: Wiktionary
Ca`py*ba"ra, n. Etym: [Sp. capibara, fr. the native name.] (Zoöl.)
Definition: A large South American rodent (Hydrochærus capybara) Living on
the margins of lakes and rivers. It is the largest extant rodent,
being about three feet long, and half that in height. It somewhat
resembles the Guinea pig, to which it is related; -- called also
cabiai and water hog.
Source: Webster’s Unabridged Dictionary 1913 Edition