-dromoussuff. Running; moving: catadromous.[From New Latin -dromus, from Greek -dromos, from dromos, act of running.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.-dromous adj combining form moving or running: anadromous; catadromous. [via New Latin from Greek -dromos, from dromos a running]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014-dromous a combining form meaning ?running,? ?following a course? in the direction or manner denoted by the initial element: anadromous. [