plural noun
Chon·​dros·​tei | \ känˈdrästēˌī\

Definition of Chondrostei

: an order of Teleostomi comprising fishes having a largely cartilaginous skeleton and skin that is scaleless or bears bony bucklers and including the sturgeons, paddlefishes, and extinct related fishes — compare glaniostomi , selachostomi

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History and Etymology for Chondrostei

New Latin, from chondr- + -ostei (plural of -osteus)

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