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Noun: riser  rI-zu(r)
  1. A person who rises (especially from bed)
    "he's usually a late riser"
     
  2. A vertical pipe in a building
    - riser pipe, riser pipeline, riser main
     
  3. Structural member consisting of the vertical part of a stair or step

Derived forms: risers

Type of: individual, mortal, person, pipage, pipe, piping, somebody, someone, soul, structural member

Part of: stair, step

Encyclopedia: Riser