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heavy oil

British  

noun

  1. a hydrocarbon mixture, heavier than water, distilled from coal tar

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Furthermore, Canadian pipeline operator Enbridge said this month it would invest over $1 billion to increase the capacity of its core network to boost deliveries of heavy oil.

From The Wall Street Journal

Chevron-chartered tanker Kerala, which is scheduled to load about 240,000 barrels of Venezuelan heavy oil at the Bajo Grande terminal at Lake Maracaibo this week, was near the Amuay ship-to-ship transfer area on Sunday night when it collided with the Bueno.

From Reuters

Ecuador has long exported oil to California, in part because the two regions produce similar types of relatively heavy oil.

From New York Times

The heavy oil is less valuable and emits more carbon than lighter types.

From New York Times

The sources added that firefighters had brought under control Wednesday's blaze at a facility of the heavy oil upgrader in eastern Venezuela, while the rest of the facilities remained operational.

From Reuters