What is "tuko-tuko"

Tuko-tuko \Tu"ko-tu*ko\, n. [From the native name .] (Zo["o]l.) A burrowing South American rodent ( Ctenomys Braziliensis). It has small eyes and ears and a short tail. It resembles the pocket gopher in size, form, and habits, but is more nearly allied to the porcupines. [Written also tucu-tuco.]