Etymology

oleomargarine

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Today it means: A fatty substance obtained by solidifying purified beef fat, used to make the butter substitute margarine; also, (US) the butter substitute produced in this way, margarine. Full definition →

First used 19th c.French oléomargarine
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The story

  1. French · derived fromoléomargarine
  2. English todayoleomargarine

From French oléomargarine, from oléo- (“oleo-”) + margarine (“margarin”).

First known use, by meaning

  • from 19th c. A fatty substance obtained by solidifying purified beef fat, used to make the butter substitute margarine; also, (US) the butter substitute produced in this way, margarine.

Etymology from Wiktionary, CC BY-SA 4.0.