Meaning of CATALYST in English

CATALYST

n.

Pronunciation: ' ka-t ə -l ə st

Function: noun

Date: 1902

1 : a substance that enables a chemical reaction to proceed at a usually 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 Collegiate English Dictionary.      Merriam Webster - Энциклопедический словарь английского языка.