riser

From Middle English ryser, risere, equivalent to rise +‎ -er.

• (UK) IPA^(key): /ˈɹaɪ.zə(ɹ)/

• Audio (US)

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• Rhymes: -aɪzə(ɹ)

diagram of a flight of stairs, the riser is labelled "rise height"

riser (plural risers)

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. (carpentry) A vertical part of a step on a staircase.
4. (archery) The main body of a bow.
5. 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).
6. A pipe connecting an individual exhaust port of an internal combustion engine to the muffler, particularly on aircraft.
7. A Manx cat with a showable short tail.
8. A strip of webbing joining a parachute's harness to the rigging lines.
9. (Casting (metalworking)) a reservoir built into a metal casting mold to prevent the formation of cavities in the casting as the metal shrinks on cooling.

• (Manx cat): longy, rumpy
• (vertical part of a step): run, tread

• serir

riser

1. present tense of rise