01 n. One of a series of flat, fringed, and usually bilobed, appendages, of which several pairs occur on the abdominal somites of many crustacean…
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1.
One of a series of flat, fringed, and usually bilobed, appendages, of which several pairs occur on the abdominal somites of many crustaceans. They are used as fins in swimming.(Zool.)