Wiktionary
polyforming
n. An early, noncatalytic process for producing petroleum / gasoline by reacting low- and high-molecular weigh hydrocarbons at high temperature
Usage examples of "polyforming".
A day or two before someone had persuaded him to get a polyforming kit He opened its box and considered starting a copy of Rodin's Kiss, but halted his hand in mid-movement and let the lid fall shut again.