Definition of oleo- in English:

oleo-

Pronunciation: /ˈəʊlɪəʊ, ˈɒlɪəʊ/

combining form

Origin

from Latin oleum 'oil'.

Definition of oleo- in:

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