Main Entry: clap·board

Pronunciation: \ˈkla-bərd; ˈkla(p)-ˌbȯrd\

Function: noun

Etymology: part translation of Dutch klaphout stave wood

Date: circa 1520

1 archaic : a size of board for making staves and wainscoting
2 : a narrow board usually thicker at one edge than the other used for siding
3\ˈklap-ˌbȯrd\ : 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

— clapboard transitive verb