riser

noun11

1. •
   Someone or something which rises.
2. •
   A platform or stand used to lift or elevate something.

   • The choir stood on risers for the performance.
3. •
   A vertical part of a step on a staircase.
4. •
   A vertical utility conduit, pipe or path between floors of a building for placement of cables (e.g. telephone, networking), or to convey fluids (e.g. gas, water).
5. •
   An audio effect that gradually increases in frequency, pitch, or volume.
6. •
   A strip of webbing joining a parachute's harness to the rigging lines.
7. •
   The main body of a bow.
8. •
   (informal) An erection of the penis.
9. •
   A pipe connecting an individual exhaust port of an internal combustion engine to the muffler, particularly on aircraft.
10. •
    A reservoir built into a metal casting mold to prevent the formation of cavities in the casting as the metal shrinks on cooling.
11. •
    A Manx cat with a showable short tail.