agnathan

noun

1. any member of the vertebrate class Agnatha.

adjective

2. agnathous.

noun

1. any jawless eel-like aquatic vertebrate of the superclass Agnatha, which includes the lampreys and hagfishes

adjective

2. of, relating to, or belonging to the superclass AgnathaSee also cyclostome

Adjective

1. Lacking a jaw.

Noun

1. See jawless fish.