Search Result for "sardonyx": 
Wordnet 3.0

NOUN (1)

1. an onyx characterized by parallel layers of sard and a different colored mineral; 



The Collaborative International Dictionary of English v.0.48:

Sardonyx \Sar"do*nyx\, n. [L., fr. Gr. ?. See Sard, and
   Onyx.] (Min.)
   A variety of onyx consisting of sard and white chalcedony in
   alternate layers.
   [1913 Webster]


WordNet (r) 3.0 (2006):

sardonyx
    n 1: an onyx characterized by parallel layers of sard and a
         different colored mineral