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Definition of CHUM SALMON
: a salmon (Oncorhynchus keta) of the northern Pacific —called also chum
Origin of CHUM SALMON
First Known Use: 1907
Lightly speckled North Pacific fish (Oncorhynchus keta) of the salmon family. The chum salmon ranges from the Mackenzie and Lena rivers in the southern Arctic southward to Japan and the Rogue River. Its weight averages about 10–12 lbs (4.5–5.5 kg). During the autumn spawning season it swims more than 2,000 mi (3,200 km) up the Yukon River.