Collins Concise English Dictionary © HarperCollins Publishers::
oleo- combining form
  1. oil: oleomargarine
Etymology: from Latin oleum oil
WordReference Random House Learner's Dictionary of American English © 2026
o•le•o /ˈoʊlioʊ/USA pronunciation  n. 
    1. margarine.

WordReference Random House Unabridged Dictionary of American English © 2026
o•le•o  (ō′lē ō′),USA pronunciation n. 
  1. margarine.
  • by shortening of oleomargarine 1880–85

oleo-, 
  1. Chemistrya combining form meaning "oil,'' used in the formation of compound words:oleograph.
  • Latin, combining form representing oleum oil

'oleo-' also found in these entries (note: many are not synonyms or translations):
oleo - oleograph - oleomargarine - oleo oil - oleophilic - oleoresin - oleo strut

Forum discussions with the word(s) "oleo-" in the title:


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