Definition of "olefins" []

• Plural form of olefin. (noun)

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• "The company, formed the 2007 merger of Houston-based Lyondell and Europe-based Basell, said market conditions and results improved across the vast majority of its business in 2010, most notably in the olefins and polyolefins and propylene oxide businesses."
• "¶ -It does not include any of Shell's U.K. retail sites, the Shell higher olefins plant and alcohols units, the lubricant oils blending plant, lubricants marketing business, Shell aviation operations at airports, non-local marine business, marine lubricants, commercial road transport marketing businesses, bitumen marketing business or the Shell technology center at Thornton."
• "Williams Cos . holds 73% limited-partner interest in Williams Partners and also possesses Canadian midstream and U.S. olefins assets."