blueback noun6 •Any of several fish. •A lake trout (Salmo oquassa). •A salmon (Oncorhynchus nerka). •A blueback herring or blueback shad (Alosa aestivalis, syn. Clupea aestivalis) similar to the alewife. •A Beardslee trout (Oncorhynchus mykiss irideus f. beardsleei). •The blueback salmon formsbluebacks
