/si prin"euh dont', si pruy"neuh-/ , n.
1. any small, soft-rayed fish of the order Cyprinodontes, of warm, fresh or brackish waters in North America, including the killifishes, topminnows, and guppies.
adj.
2. of, pertaining to, or resembling the cyprinodonts.
[ 1855-60; cyprin ( us ) ( kyprînos carp) + -ODONT ]