单词	chondrichthyan
释义	chondrichthyan noun 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. Fabien Tepper, Christian Science Monitor, 23 Jan. 2014 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.) John G. Maisey, Natural History, June 1998 chondrichthyan adjective or less commonly chondrichthian chondrichthyan fishes Word History First Known Use 1963, in the meaning defined above
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