clapperboard

noun
🔊/ˈklæpəbɔːd/
🔊/ˈklæpərbɔːrd/
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  1. a device that is used when making films. It consists of two connected boards that are hit together at the start of a scene, and its purpose is to help to match the pictures with the sound.(拍摄电影用的)场记板,拍板Topics Film and theatrec2