Definition of eco- in English:

eco-

Pronunciation: /ˈiːkəʊ
 
, ˈɛkəʊ/

combining form

Representing ecology, ecological, etc. .

Definition of eco- in:

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Word of the day oleaginous
Pronunciation: ˌəʊlɪˈadʒɪnəs
adjective
rich in, covered with, or producing oil; oily