Noun, pl. ecologies
1. Branch of biology that deals with the study of the interactions of living organisms with one another and with the non-living elements of their environment.
2. Ecological science: the science concerned with the interactions of living organisms with each other and with their environment, also called bionomics. (biology-online.org)
3. A branch of biology that deals with the distribution, abundance and interactions of living organisms at the level of communities, populations, and ecosystems, as well as at the global scale. (biology-online.org)
4. The system within the environment as it relates to organisms living in it. (biology-online.org)
5. A branch of sociology that deals with the relations of human beings with their physical and social environment, also called as human ecology. (biology-online.org)
6. The scientific study of the relationships that living organisms have with each other and with their natural environment. Topics of interest to ecologists include the composition, distribution, amount (biomass), number, and changing states of organisms within and among ecosystems. (wikipedia.com)
Word origin: From German Ökologie, from Ancient Greek οἶκος, oikos house + -λογία, -logia, study of