1) Ecology 
study of interaction of life in the environment
Synonym for ecology ... <study> The scientific study of the relationship of organisms to each other and to their environment. ... (09 Oct 1997) ... 
Type: Term Pronunciation: bī′ō-ē-kol′ō-jē Synonyms: ecology
bioecology, bioecological 1. The science of organisms as affected by the factors of their environments. 2. The study of the environment and life history of organisms. 3. The study of the interrelations among living organisms in their natural environment; ecology.
the study of the interrelations among living organisms in their natural environment; ecology.