three-spined stickleback

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noun \ ˈthrē-ˈspīn(d)- \

Definition of three-spined stickleback

:a stickleback (Gasterosteus aculeatus) chiefly of fresh and brackish waters that typically has three dorsal spines called also three-spine stickleback

Illustration of three-spined stickleback

First Known Use of three-spined stickleback

1769


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