from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The study of the mutual interrelationships between organisms and their environment; branch of biology; former term for ecology
- n. The environmental or sociological influence on a person
from The Century Dictionary and Cyclopedia
- n. The sum of human knowledge concerning the relations of an organism to its environment.
meso- + -logy; a compound with components derived from Ancient Greek μέσος (mésos, "meso-, middle") + -λογία (-logía, "-logy, branch of study"). The term arose in various European languages c. 1850, but did not exist in Ancient Greek. (Wiktionary)