back·board /-ˌbord, ˌbɔrd/
  後板,背板,靠背板,籃板
  back·board /-ˌbɔrd/ 名詞
  底板
  backboard
  底板
  Back·board n.
  1. A board which supports the back when one is sitting; specifically, the board athwart the after part of a boat.
  2. A board serving as the back part of anything, as of a wagon.
  3. A thin stuff used for the backs of framed pictures, mirrors, etc.
  4. A board attached to the rim of a water wheel to prevent the water from running off the floats or paddles into the interior of the wheel.
  5. A board worn across the back to give erectness to the figure.
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  backboard
       n 1: a raised vertical board with basket attached; used to play
            basketball; "he banked the shot off the backboard" [syn:
             basketball backboard]
       2: a board used to support the back of someone or something