• WordNet 3.6
    • n Ostariophysi in some classifications considered a superorder comprising the Cypriniformes and the Siluriformes
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Century Dictionary and Cyclopedia
    • ostariophysi Those fishes which have a chain of osselets between the air-bladder and the brain, including the characinoid, eventognath, gymnotoid, and nematognath types.
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In literature:

Accordingly these families are now placed together in a distinct sub-order, the Ostariophysi.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2" by Various