n. 1. Any of a class of unsaturated open-chain hydrocarbons having at least one double bond. 2. A fiber or fabric made of this material. [French (gaz) oléfiant, oil-forming (gas), ethylene : Latin oleum, oil; see OIL + French -fiant, present participle of -fier, -fy.] o′le·finic adj. |
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