pro·​pyl·​ene | \ˈprō-pə-ˌlēn \

Definition of propylene 

: a flammable gaseous hydrocarbon C3H6 obtained by cracking petroleum hydrocarbons and used chiefly in organic synthesis

Examples of propylene in a Sentence

Recent Examples on the Web

Because of declines in distillates, residual fuel oils, propane, propylene and other oils, the nation's total petroleum stockpiles actually declined by 2.7 million barrels last week, despite the crude and fuel builds. Jordan Blum, Houston Chronicle, "Crude, fuel inventories continue to build," 14 Feb. 2018 Those declines were partially offset by increases in stockpiles of other petroleum products, such as propane and propylene. Fuelfix Staff, Houston Chronicle, "Crude, gasoline stockpiles fall," 9 May 2018 Despite declines in distillates, propane, propylene and other fuel oils by more than 1 million barrels, the total commercial petroleum inventories increased by 3.7 million barrels last week. Ryan Maye Handy, Houston Chronicle, "Crude, gasoline inventories rise," 28 Feb. 2018 Inventories of distillates, propane and propylene fell by several million barrels last week, contributing to an overall decline in petroleum products. Ryan Maye Handy, Houston Chronicle, "U.S. crude inventory gain offset by product decline," 14 Mar. 2018 Both forms of cigarette use caused the presence of much higher levels of dangerous chemicals in the users’ bodies, including acrylonitrile, acrolein, propylene oxide, acrylamide and crotonaldehyde, the team reported. Benjamin Fearnow, Newsweek, "E-Cigarette Users Ingest High Levels of Cancer-Causing Chemicals, Leads to Traditional Smoking," 6 Mar. 2018 The plant will have the biggest production capacity in the world for these chemicals, capable of manufacturing 1 billion pounds of propylene oxide and 2.2 billion pounds of tertiary butyl alcohol a year. Jordan Blum, Houston Chronicle, "LyondellBasell plans new $2B chemicals and plastics project along Gulf Coast," 25 Oct. 2017 Some of those noxious gases include carbon monoxide, ethylene, sulfur dioxide, nitrogen oxides, propylene, propane, ethane, benzene and other volatile organic compounds. Gregory Wallace, CNN, "Industrial pollution spikes in Harvey's wake," 5 Sep. 2017 The resulting ethylene gas is separated from co-products such as propylene, and then piped to other production units for conversion to a vast array of products. Jack Kaskey,, "Harvey’s Made the World’s Most Important Chemical a Rare Commodity," 1 Sep. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'propylene.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of propylene

1850, in the meaning defined above

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The first known use of propylene was in 1850

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More Definitions for propylene


pro·​pyl·​ene | \ˈprō-pə-ˌlēn \

Medical Definition of propylene 

: a flammable gaseous hydrocarbon C3H6 obtained by cracking petroleum hydrocarbons and used chiefly in organic synthesis

called also propene

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