The Collaborative International Dictionary of English v.0.48:

Turdus \Tur"dus\, pr. n. [L., a thrush.] (Zool.)
   A genus of singing birds including the true thrushes.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Turdus
    n 1: type genus of the Turdidae [syn: Turdus, genus Turdus]