Search Result for "zeta":
Wordnet 3.0

NOUN (1)

1. the 6th letter of the Greek alphabet; 



The Collaborative International Dictionary of English v.0.48:

Zeta \Ze"ta\, n. [L., from Gr. ?. Cf. Zed.]
   A Greek letter [[zeta]] corresponding to our z.
   [1913 Webster]