Source : Webster's Revised Unabridged Dictionary (1913)

Cornelian \Cor*nel"ian\ (k?r-n?lyan), n. [F. cornaline, OF.
   corneline, fr. L. cornu horn. So called from its horny
   appearance when broken. See {Horn}, and cf. {Carnelian}.]
   (Min.)
   Same as {Carnelian}.

Source : WordNet®

cornelian
     n : a translucent red or orange variety of chalcedony [syn: {carnelian}]