Real Dictionary

armadillo
countable noun: An armadillo is a small animal whose body is covered with large bony scales and which rolls itself into a ball when it is attacked. Armadillos are mainly found in South and Central America.

armadillo in American English
any of a family (Dasypodidae) of burrowing edentate mammals with an armorlike covering of bony plates, ranging from the S U.S. to Argentina: they are mostly nocturnal, and a few species roll up into a ball when attacked
noun: any of several burrowing, chiefly nocturnal mammals constituting the family Dasypodidae, ranging from the southern U.S. through South America, having strong claws and a jointed protective covering of bony plates: used in certain areas for food

armadillo in British English
noun: any edentate mammal of the family Dasypodidae of Central and South America and S North America, such as Priodontes giganteus ( giant armadillo). They are burrowing animals, with peglike rootless teeth and a covering of strong horny plates over most of the