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economic efficiency principle
economic geography
economic geology
economic good
economic indicator
economic life
economic migrant
economic miracle
economic order quantity
economic poison
economic rent
economic risk
economic surplus
economic union
economic welfare
economic zone
economical
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ecology
e·col·o·gy [ i kólləjee ]


noun 
Definition:
 
1. study of organisms and the environment: the study of the relationships between living organisms and their interactions with their natural or developed environment
2. social sciences 
Same as  human ecology
[Late 19th century. < Greek oikos "house, habitation"]

ec·o·log·i·cal [ èkə lójjik'l, kə lójjik'l ] adjective
ec·o·log·i·cal·ly adverb
e·col·o·gist noun
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