- any member of the vertebrate class Agnatha.
Origin of agnathan
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- any jawless eel-like aquatic vertebrate of the superclass Agnatha, which includes the lampreys and hagfishes
- of, relating to, or belonging to the superclass AgnathaSee also cyclostome
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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.