How do you spell Hannukah?
1873, "branch of science dealing with the relationship of living things to their environments, coined by German zoologist Ernst Haeckel (1834-1919) as Okologie, from Greek oikos "house, dwelling place, habitation" (see villa) + -logia "study of" (see -logy). In use with reference to anti-pollution activities from 1960s.
ecology e·col·o·gy (ĭ-kŏl'ə-jē)
The branch of science that is concerned with the relationships between organisms and their environments.
The relationship between organisms and their environments.
The study of the detrimental effects of modern civilization on the environment, with a view toward their prevention or reversal through conservation.
The study of living things, their environment, and the relation between the two.