half-pipe

• halfpipe

A halfpipe used for snowboarding

half-pipe (plural half-pipes)

1. (skateboarding, snowboarding, etc.) A structure used to perform tricks, approximately semicircular in cross-section, resembling the bottom half of a cylinder laying down.
   • 2009, January 24, “Randy Starkman”, in Silver medal eases pain for Batchelor at world championships‎:

     But the kid who washed windows for $2 an hour when he was 8 so he could buy his first snowboard served notice he could be a contender at the 2010 Vancouver Olympics with a silver medal yesterday in men's halfpipe.

• quarter-pipe
• superpipe
• slopestyle