The Collaborative International Dictionary of English v.0.48:

Canorous \Ca*no"rous\, a. [L. canorus, from nor melody, fr.
   canere to sing.]
   Melodious; musical. "Birds that are most canorous." --Sir T.
   Browne.
   [1913 Webster]

         A long, lound, and canorous peal of laughter. --De
                                                  Quincey.
   [1913 Webster]

WordNet (r) 3.0 (2006):

canorous
    adj 1: richly melodious [syn: canorous, songful]