weath·er·board·ing /-ˌbordɪŋ, ˌbɔr-/
  護牆;護牆板
  Weath·er·board·ing, n. Arch. (a) The covering or siding of a building, formed of boards lapping over one another, to exclude rain, snow, etc.  (b) Boards adapted or intended for such use.
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  weatherboarding
       n : a long thin board with one edge thicker than the other; used
           as siding by lapping one board over the board below [syn:
            clapboard, weatherboard]