Origin of oleaginousFrench oléagineux ; from Classical Latin oleaginus ; from olea, olive tree (; from Classical Greek elaia, olive, olive tree)
- Of or relating to oil.
- Falsely or smugly earnest; unctuous: oleaginous flattery.
Origin of oleaginousFrom Middle English oliaginose and from French oléagineux (from Old French), both from Latin oleaginus, of the olive tree, from olea, olive tree, alteration (influenced by oleum, olive oil) of ol&imacron;va; see olive.
(comparative more oleaginous, superlative most oleaginous)