- a combining form meaning “oil,” used in the formation of compound words: oleograph.
Also especially before a vowel, ole-.
Origin of oleo-
< Latin, combining form representing oleum oil
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
from Latin oleum oil
Word Origin and History for oleo-
word-forming element meaning "oil" or "oleic," from Latin oleum (see oil (n.)).
Online Etymology Dictionary, © 2010 Douglas Harper
- Oil:oleic acid.