ChondrichthyesPronunciation: /kɒnˈdrɪkθiːz/Definition of Chondrichthyes noun Zoology a class of fishes that includes those with a cartilaginous skeleton. Compare with Osteichthyes.Origin:modern Latin, from Greek khondros 'cartilage' + ikhthus 'fish'Chondrichthyes in other Oxford dictionaries Definition of Chondrichthyes in the US English dictionary