Dictionary

killifish

noun kil·li·fish \ˈki-li-ˌfish\

Definition of KILLIFISH

1
:  any of a family (Cyprinodontidae) of numerous small oviparous fishes much used as bait and in mosquito control
2
:  any of various live-bearers (family Poeciliidae)

Origin of KILLIFISH

killie killifish (perhaps from 3kill) + fish
First Known Use: 1836

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