Agnatha
plural noun
Ag·na·tha
ˈag-nə-thə
1
: a superclass or other division of Vertebrata comprising those without jaws compare gnathostomata
2
: a group of carnivorous air-breathing snails without jaws
Word History
Etymology
borrowed from New Latin, from a- a- entry 2 + -gnatha -gnatha
First Known Use
1865, in the meaning defined at sense 1