The Collaborative International Dictionary of English v.0.48:
Tardo \Tar"do\, n. [Sp., slow, L. tardus.] (Zool.) A sloth. [1913 Webster]The Collaborative International Dictionary of English v.0.48:
Tardo \Tar"do\, a. [It.] (Mus.) Slow; -- a direction to perform a passage slowly. [1913 Webster]