ecology

Term: ecology

Origin: Greek from οίκος(=house) + λόγος/logos (=discourse, study of) . Οίκος>σοίκος>σάκος=προστασία (=protection)

Coined: in 1866 by German zoologist (and also artist, writer and a professor of comparative anatomy) Ernst Haeckel (1834-1919) as Okologie 

Definition:

The branch of science studies the relationships between organisms and their environments

Runon derivatives :

ecosystem, ecosphere

comments:

 Ecology is sometimes called, the economy of nature