Mykiss \My"kiss\, n. [Russ. muikize, prob. fr. a native name.] (Zo["o]l.) A salmon ({Salmo mykiss}, syn. {S. purpuratus}) marked with black spots and a red throat, found in most of the rivers from Alaska to the Colorado River, and in Siberia; -- called also {black-spotted trout}, {cutthroat trout}, and {redthroat trout}.