Clapboard
Clapboard (/ˈklæpˌbɔːrd/ or /ˈklæbərd/), also called bevel siding, lap siding, and weatherboard, with regional variation in the definition of those terms, is wooden siding of a building in the form of horizontal boards, often overlapping.
Clapboard, in modern American usage, is a word for long, thin boards used to cover outer walls and (formerly) roofs of buildings. Historically, it has also been spelled clawboard and cloboard. In the United Kingdom, Australia and New Zealand, the term weatherboard is used. Australians also use the term chamferboard for the tongue-and-groove variant.
An older meaning of clapboard is small split pieces of oak imported from Germany for use as barrel staves, and the name is a partial translation (from klappen, "to fit") of Middle Dutch klapholt and related to German Klappholz.