blackfin

[ blak-fin ]
/ ˈblækˌfɪn /

noun

a cisco, Coregonus nigripinnis, found in the Great Lakes.

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Also called blackfin cisco.

Origin of blackfin

An Americanism dating back to 1870–75; black + fin1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020