A Substance That Speeds Up a Chemical Reaction

This page is the CodyCross answer for the clue below from Australia, Group 1008, Puzzle 1 (Geoffrey Gurrumul Yunupingu).

Question is: A Substance That Speeds Up a Chemical Reaction

and the answer is: CATALYST

Word Meaning:

CATALYST — (chemistry) A substance that increases the rate of a chemical reaction without being consumed in the process.

Definitions from Wiktionary.