1) Biological science 2) Biology 3) Bionomical 4) Ecologic 5) Ecological 1) Bionomical 2) Ecologic 
bionomic (s), bionomical 1. Of or pertaining to the conditions under which an organism lives in its natural habitat; of or pertaining to bionomics. 2. The branch of biology that deals with the mode of life of organisms in their natural habitat, their adaptation to their surroundings, etc.; ecology.