From 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]
From WordNet (r) 3.0 (2006) :
Turdus
n 1: type genus of the Turdidae [syn: Turdus, genus Turdus]