Rectangular tiles used in Western games or gambling, typically arranged in lines to create a chain reaction when tipped

domino effect; a chain reaction where one event triggers a series of similar events, like falling dominoes; also called [[多米诺效应|多米諾效應|duo1 mi3 nuo4 xiao4 ying4]]

political theory that if one country in a region falls to an opposing ideology, nearby countries will follow in a chain reaction; originally proposed by U.S. President Eisenhower regarding Southeast Asia