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English definition of “oleaginous”

oleaginous

adjective     /ˌəʊ.liˈædʒ.ɪ.nəs/ US  /ˌoʊ-/ formal
extremely polite , kind , or helpful in a false way that is intended to bring some advantage to yourselfAffected and insincere
(Definition of oleaginous adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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