any small tropical or subtropical soft-finned fish of the mostly marine family Cyprinodontidae, resembling carp but having toothed jaws. The group includes the guppy, killifish, swordtail, and topminnow
adjective
2.
of, relating to, or belonging to the Cyprinodontidae
Word origin
C19: from Latin cyprīnus carp (see cyprinid) + -odont
cyprinodont in American English
(sɪˈprɪnəˌdɑnt; sɪˈpraɪnədɑnt)
noun
killifish
Word origin
< Gr kyprinos, carp (< kypros, sprig of henna, prob. < Sem as in Heb kōpher: in allusion to its color) + -odont