• Webster's Revised Unabridged Dictionary
    • n. pl Chondrostei (Zoöl) An order of fishes, including the sturgeons; -- so named because the skeleton is cartilaginous.
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Century Dictionary and Cyclopedia
    • chondrostei In Müller's system of classification (1845), an order of ganoid fishes, characterized by the skeleton being partly cartilaginous, partly bony, and the skin naked or provided with osseous bucklers.—
    • chondrostei In Cope's system of classification, a primary division of actinopterous fishes, with an entire series of basilar segments of the abdominal ventral fins, and with no branchiostegal rays and no pterotic bone: synonymous with Chondroganoidea.
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Webster's Revised Unabridged Dictionary
NL., fr. Gr. cartilage + bone