noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A process that uses catalysts to rearrange the existing molecules of heavy fuel oils to remove sulfur and convert low-value fuel oils into higher-yield products such as gasoline. uncountable

Etymology

A proprietary name, from iso- + cracking; developed in 1959.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.