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anadromous

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adjective anad·ro·mous \ə-ˈna-drə-məs\

Definition of anadromous

: ascending rivers from the sea for breeding shad are anadromous — compare catadromous

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Origin and Etymology of anadromous

Greek anadromos running upward, from anadramein to run upward, from ana- + dramein to run — more at dromedary

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First Known Use: circa 1753

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