Adjective oleaginous has 2 senses
  1. buttery, fulsome, oily, oleaginous, smarmy, unctuous - unpleasantly and excessively suave or ingratiating in manner or speech; "buttery praise"; "gave him a fulsome introduction"; "an oily sycophantic press agent"; "oleaginous hypocrisy"; "smarmy self-importance"; "the unctuous Uriah Heep"
    Antonym: sincere (indirect, via insincere)
  2. greasy, oily, sebaceous, oleaginous - containing an unusual amount of grease or oil; "greasy hamburgers"; "oily fried potatoes"; "oleaginous seeds"
    Antonyms: nonfat, fat-free, fatless (indirect, via fatty)
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