Substance That Slows Down a Chemical Reaction
This page is the CodyCross answer for the clue below from Prehistory, Group 1259, Puzzle 3 (Thylacosmilus).
Question is: Substance That Slows Down a Chemical Reaction
and the answer is: INHIBITOR
Word Meaning:
INHIBITOR — One who, or that which, inhibits.
Definitions from Wiktionary.