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noun
A processing unit in oil refinery that reduces the quantity of residual oil produced in the distillation of crude oil to increase the yield of more valuable middle distillates (heating oil and diesel) by thermally cracking large hydrocarbon molecules in the oil.
Definition source: English Wiktionary via Wiktextract
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
History
From viscosity breaker.
