SARDIUS Meaning of SARDIUS in English [ 'sα:dɪəs ]■ noun a red precious stone mentioned in the Bible (e.g. Exod. 28:17) and in classical writings, probably ruby or carnelian.OriginME: via late L. from Gk sardios . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004