backboard

noun

1. The flat vertical surface to which the basket is attached.
2. A flat vertical wall with the image of a tennis net drawn or painted on it, designed to practice hitting against such that the ball rebounds.
3. A spine board.
4. A board placed at the back of a cart, boat, behind a signal, etc.

   “The L.B.S.C.R. favoured backboards for signals wherever these helped visibility. The Great Eastern also made extensive use of backboards.”

   “He […]had ridden the remainder of the way clinging to the backboard of a cotton wagon.”

5. (uncountable, usually)The port or larboard side of a ship

   “And to delight in the fact that a hole on the backboard side means that you're safe because you're sitting on the starboard side seems to me to be less than clever.”

   “But the gangplank was no longer in place. It had folded itself in half and clamped into storage position, becoming part of the starboard rail. Big Tom peered over the rail and saw nothing but sea. All around. Starboard, backboard, forward, aft.”

verb

1. (transitive)To place (a patient) on a spine board.