'Sardius' definitions:

Definition of 'sardius'

From: WordNet
noun
A deep orange-red variety of chalcedony [syn: sard, sardine, sardius]

Definition of 'Sardius'

From: GCIDE
  • Sardius \Sar"di*us\, 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]