Heterognathi
plural noun
Het·er·og·na·thi
ˌhetəˈrägnəˌthī
in some classifications
: an order of teleost fishes that resemble members of the family Cyprinidae but have an adipose fin and teeth in the jaws and that comprise Characidae and related families now usually included in a division of the suborder Cyprinoidea compare ostariophysi
Word History
Etymology
New Latin, from heter- + -gnathi (plural of -gnathus -gnathous)