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)

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now