EC-

I. prefix

Etymology: Middle English, from Old French, from Latin, from Greek ek, from ex — more at ex-

: out of : outside of : outside

ec cyesis

II. combining form

or eco- also oec- or oeco- or oiko-

Etymology: earlier also yco-, from Middle French & Late Latin; Middle French yco-, from Late Latin oeco-, oiko-, from Greek oik-, oiko-, from oikos house, habitation — more at vicinity

1.

a. : household

eco nomy

b. : economic and

eco -cultural

2. : habitat or environment especially as a factor significantly influencing the mode of life or the course of development

eco species

eco system

ec ad

III. combining form

or eco-

: ecological or environmental

eco catastrophe