[1] : The Collaborative International Dictionary of English v.0.48

tatouay \tat"ouay\, n. of brazilian origin; cf. pg. tatu, f.
   tatou. zool.
   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.
   1913 webster
see also:
xenurus unicinctus tatouary broad-banded armadillo 

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