Source : Webster's Revised Unabridged Dictionary (1913)

Tatouay \Tat"ou*ay\, n. [Of Brazilian origin; cf. Pg. tatu, F.
   tatou.] (Zo["o]l.)
   An armadillo ({Xenurus unicinctus}), native of the tropical
   parts of South America. It has about thirteen movable bands
   composed of small, nearly square, scales. The head is long;
   the tail is round and tapered, and nearly destitute of
   scales; the claws of the fore feet are very large. Called
   also {tatouary}, and {broad-banded armadillo}.

Source : WordNet®

tatouay
     n : naked-tailed armadillo of tropical South America [syn: {cabassous},
          {Cabassous unicinctus}]