bi·o·nom·ics (b???-n?m??ks)n. (used with a sing. verb) The science of ecology.[From French bionomique, pertaining to ecology, from bionomie, ecology : Greek bio-, bio- + Greek -nomi?, -nomy.]bi?o·nom?ic, bi?o·nom?i·cal adj.bi?o·nom?i·cal·ly adv.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.bionomics (?ba???n?m?ks) n (Environmental Science) (functioning as singular) a less common name for ecology1, ecology2 Also (rare): bionomy [C19: from bio- + nomics on pattern of economics] ?bio?nomic adj ?bio?nomically adv bionomist nCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014e?col?o?gy (??k?l ? d?i) n. 1. the branch of biology dealing with the relations and interactions between organisms and their environment. 2. the set of relationships existing between organisms and their environment. 3. Also called human ecology. the branch of sociology concerned with the spacing and interdependence of people and institutions. 4. the advocacy of protection of the air, water, and other natural resources from pollution or its effects; environmentalism. [1870?75; earlier oecology