From Longman Dictionary of Contemporary EnglishRelated topics: Utensilsegg-timerˈegg-ˌtimer noun [countable]DFUa small glasscontainer with sand in it that runs from one part to the other in about three or five minutes, used for measuring the time it takes to boil an eggExamples from the Corpusegg-timer• Joyce's family is numbered with the grains of sand in a thousand egg-timers.