__ Effect, a Way of Describing a Chain Reaction
Puzzle 18 of Pop Bands Pack
Question is: __ Effect, a Way of Describing a Chain Reaction
and the answer is: DOMINO
Word Meaning:
DOMINO — (dominoes) A tile divided into two squares, each having 0 to 6 (or sometimes more) dots or pips (as in dice), used in the game of dominoes.
Definitions from Wiktionary.