CLAPBOARD

noun Etymology: part translation of Dutch klaphout stave wood Date: circa 1520 a size of board for making staves and wainscoting, a narrow board usually thicker at one edge than the other used for siding, a pair of hinged boards one of which has a slate with data identifying a piece of film and which are banged together in front of a motion-picture camera at the start of a take to facilitate editing, ~ transitive verb