eco, oeco-, oec-

1. The branch of the biological sciences that deals with the relationship between organisms and their environment, including their relationship with other organisms.
2. The science concerned with interactions between organisms and the environment on spatial scales ranging from parts of individuals to the biosphere as a whole.

Literally, ecology means the "study of houses". The word was coined as ökologie by Ernst Haeckel, a German zoologist, in the 1870’s, based on the Greek word oikos. Although this means “house”, Haeckel was using it in the wider sense as “dwelling, habitat”. It was adopted into English soon after its coinage, originally as oecology which is similar to a Latin form.

Ecology has been divided into four major sub fields:

• Physiological ecology, concerned with interactions between individual organisms and the environment.
• Population biology, the regulation of population growth and population size, and interactions among populations.
• Community ecology, characteristics of the collective properties of the organisms in an area.
• Ecosystem ecology, regulation of the flows of energy and material in terrestrial and aquatic ecosystems.

1. A morbid attitude toward the members of one’s family [domineering behavior at home and humility toward other persons in authority].
2. A pathological dislike of the members of one’s family often resulting in a feeling that one must get away from them.

In psychology, a mental attitude whereby one is hostile and domineering toward one’s own family but who is submissive to those in an outside authority.

The study of the relationship between the ecological relations of an individual and its morphology.

1. The branch of economics concerned with the application of mathematical economics to economic data by the use of statistical methods.
2. Of, or relating to, or characterized by, the application of mathematics to economic data or theories.

A student of, or specialist in, econometrics.

The branch of economics concerned with the application of mathematical economics to economic data by the use of statistical methods.

1. Pertaining to the management of a household, or to the ordering of private affairs.
2. Relating to the science of economics; relating to the development and regulation of the material resources of a community or nation.
3. The science relating to the production and distribution of material wealth; sometimes used as equivalent to political economy, but more frequently with reference to practical and specific applications.

The study of the production, distribution, and consumption of goods and services.

1. One who manages a household; a housekeeper.
2. Someone who studies, works, or is an expert in the field of economics.

The action or process of economizing (force, material, etc.).

1. The production and consumption of goods and services of a community regarded as a whole.
2. The prudent managing of resources to avoid extravagant expenditure or waste.
3. A saving or attempt to reduce expenditure.
4. Originally, the management of a household.
5. Current usage is sometimes a reference to that which is intended to be less expensive or to give better value.

The basic notion contained in the word economy is “household management”. It comes from Greek oikonomia, by way of French or Latin, and means the "steward of a household". This was a compound noun formed from oikos, "house" and nemein, “manage”. The original sense "household management" was extended into English. It broadened out in the 17th century to the management of a nation's resources, while the use of the derivative economics for the theoretical study of the creation and consumption of wealth dates from the early 19th century.

1. A morbid dislike of home or an abnormal fear of being home or in one’s house.
2. A fear of home life or surroundings, including house-hold appliances, equipment, electricity, bathtubs, household chemicals, and many other common objects in the home.

The study of the interrelationship between an organism’s physical functioning and its environment.

The scientific study of the breakdown of ecosystems and the processes involved in the re-diversification of species.