The Collaborative International Dictionary of English v.0.48:
Xenarthra \Xen*ar"thra\ prop. n. The suborder of mammals including the armadillos, American anteaters, and sloths. Syn: suborder Xenarthra. [WordNet 1.5]WordNet (r) 3.0 (2006):
Xenarthra n 1: armadillos; American anteaters; sloths [syn: Xenarthra, suborder Xenarthra]