timer

汉语翻译

n. 计时员, 计时器
【计】 计时器
【化】 定时器; 计时器; 时间继电器
【医】 定时器, 时计, 限时器

英语解释：

名词 timer:

1. a timepiece that measures a time interval and signals its end
2. (sports) an official who keeps track of the time elapsed
   同义词：timekeeper
3. a regulator that activates or deactivates a mechanism at set times