| 单词 | chondrichthyan | 
| 释义 | chondrichthyannoun  chon·drich·thy·an  kän-ˈdrik-thē-ən   variants  or less commonly chondrichthian     plural chondrichthyans also chondrichthians     : a fish of the class Chondrichthyes : a cartilaginous fish  One quarter of all the world's cartilaginous fish species—known as chondrichthyans—are now threatened, reports a study published Tuesday in the journal eLife. Sharks, rays, and their less numerous kin the chimaeras, or ratfishes, are characterized by skeletons composed of cartilage rather than solid bone. (Collectively, they are known as chondrichthyans; bony fishes are the osteichthyans.)  chondrichthyan adjective    or less commonly chondrichthian   chondrichthyan fishes   | 
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