blueback herring

noun
blue·​back herring | \ ˈblü-ˌbak- How to pronounce blueback herring (audio) \

Definition of blueback herring

: an anadromous clupeid fish (Alosa aestivalis) of the Atlantic coast of North America having a dark blue or bluish-gray back

First Known Use of blueback herring

1873, in the meaning defined above

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