isospondylous

adjective
  1. of, relating to, or belonging to the Isospondyli (or Clupeiformes), an order of soft-finned teleost fishes that includes the herring, salmon, trout, and pike

Word Origin for isospondylous

C20: from iso- + Greek spondulos vertebra
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