Source : Webster's Revised Unabridged Dictionary (1913)

Sard \Sard\, n. [L. sarda, Gr. ?, or ? (sc. ?), i.e., Sardian
   stone, fr. ? Sardian, ? Sardes, the capital of Lydia: cf. F.
   sarde. Cf. {Sardius}.] (Min.)
   A variety of carnelian, of a rich reddish yellow or brownish
   red color. See the Note under Chalcedony.

Source : WordNet®

sard
     n : a deep orange-red variety of chalcedony [syn: {sardine}, {sardius}]