any member of the vertebrate class Agnatha.
Origin of agnathan
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
any jawless eel-like aquatic vertebrate of the superclass Agnatha, which includes the lampreys and hagfishes
Word Origin for agnathan
C19: from New Latin agnatha, from a- 1 + Greek gnathos jaw
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Lacking a jaw.
See jawless fish.
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