Definition of cartilaginous fish
: any of a class (Chondrichthyes) of fishes (such as a shark, ray, or chimaera) having the skeleton wholly or largely composed of cartilage — compare bony fish, jawless fish
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Merriam-Webster unabridged
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Time Traveler for cartilaginous fish
The first known use of cartilaginous fish was in 1769
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