-coloussuff. Having a specified kind of habitat: arenicolous.[From Latin -cola, tiller, inhabitant; see kwel- in Indo-European roots.]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.-colous adj combining form (Biology) inhabiting or living on: arenicolous. [from Latin -cola inhabitant + -ous; related to colere to inhabit]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014-colous a combining form meaning ?inhabiting? the thing or place specified by the initial element: nidicolous. [