Meaning of CATALYST in English

CATALYST

[cat.a.lyst] n (1902) 1: a substance (as an enzyme) that enables a chemical reaction to proceed at a usu. faster rate or under different conditions (as at a lower temperature) than otherwise possible

2: an agent that provokes or speeds significant change or action

Merriam-Webster English vocab.      Английский словарь Merriam Webster.