\Ya"pock\ (?; 277), n. [Probably from the river Oyapok,
between French Guiana and Brazil.] (Zo["o]l.)
A South American aquatic opossum ({Chironectes variegatus})
found in Guiana and Brazil. Its hind feet are webbed, and its
fore feet do not have an opposable thumb for climbing. Called
also {water opossum}. [Written also {yapack}.]