[1] : The Collaborative International Dictionary of English v.0.48

sardius \sar"dius\, n. l. sardius, lapis sardinus, gr. ?, ?,
   ?. see sard.
   a precious stone, probably a carnelian, one of which was set
   in aaron's breastplate. --ex. xxviii. 17.
   1913 webster
see also:
sard 

[2] : WordNet (r) 2.0

sardius
     n : a deep orange-red variety of chalcedony syn: sard, sardine
see also:
sard sardine 

Sardius >> S Words
Sardius, definition of term: Sardius
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