SARDONYX Meaning of SARDONYX in English [ 'sα:dənɪks ]■ noun onyx in which white layers alternate with sard.OriginME: via L. from Gk sardonux , prob. from sardios 'sardius' + onux 'onyx'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004