killifish noun. ['kɪlɪfɪʃ] Pl. -es [-ɪz], (usu.) same. E19.
[App. from KILL noun² + FISH noun¹.]
Any of several small, often brightly coloured toothcarps of the families Cyprinodontidae and Poeciliidae; esp. any of the genus Fundulus, found esp. in sheltered rivers and estuaries of eastern N. America. Also called topminnow.

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