Agnatha

 
Pronunciation: /agˈneɪθə/

plural noun

Zoology
  • a group of primitive jawless vertebrates which includes the lampreys, hagfishes, and many fossil fishlike forms. Compare with cyclostome.
    • Superclass Agnatha: the living forms are in the classes Myxini (hagfishes) and Cephalaspidomorphi (lampreys)

Derivatives

agnathan

noun & adjective

Origin:

from modern Latin Agnatha, from a-1 'without' + Greek gnathos 'jaw'