The Collaborative International Dictionary
Oncorhynchus nerka
Blueback \Blue"back`\, n. (Zo["o]l.)
A trout ( Salmo oquassa) inhabiting some of the lakes of Maine.
A salmon ( Oncorhynchus nerka) of the Columbia River and northward.
An American river herring ( Clupea [ae]stivalis), closely allied to the alewife.