IPA: //paɪˈrɒlɪsɪs//
KK: /paɪˈrɑləsɪs/
The process of breaking down a substance through the application of heat, resulting in a chemical change.
Pyrolysis is often used to convert organic materials into biofuels.
Pyrolysis is formed from "pyro-" (from Greek "pur", meaning fire) and "lysis" (from Greek "lysis", meaning to break down or loosen). The word describes the process of breaking down organic material using heat in the absence of oxygen, effectively breaking it down with fire.
Think of 'fire' ('pyro-') breaking things down ('lysis') — that's what pyrolysis means.