English word oleomargarine comes from English margarine, English oleo- (Oil or oil-based materials.)

Detailed word origin of oleomargarine

Dictionary entry	Language	Definition
margarine	English (eng)	(dated) The solid ingredient of human fat, olive oil, etc.. A spread, manufactured from a blend of vegetable oils (some of which are hydrogenated), emulsifiers etc, mostly used as a substitute for butter.
oleo-	English (eng)	Oil or oil-based materials.
oleomargarine	English (eng)	(dated) margarine.

Words with the same origin as oleomargarine