clapboards
noun(clap-board)
a size of board for making staves and wainscoting
clapboards
noun(clap-board)
a narrow board usually thicker at one edge than the other used for siding
clapboards
noun(clap-board)
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 —called also clapper board