| Noun | 1. | genus Triaenodon - a genus of Triakidae fish genus - any of various genus of fish family Triakidae, Triakidae - small sharks with smooth skins and lacking spines on their dorsal fins reef whitetip shark, Triaenodon obseus, whitetip shark - smooth dogfish of Pacific and Indian Oceans and Red Sea having white-tipped dorsal and caudal fins |