1. eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms; [syn: jawless vertebrate, jawless fish, agnathan]
WordNet (r) 3.0 (2006):
jawless vertebrate
n 1: eel-shaped vertebrate without jaws or paired appendages
including the cyclostomes and some extinct forms [syn:
jawless vertebrate, jawless fish, agnathan]