riser

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a person who rises (especially from bed)
- he's usually a late riser
• Derivationally related forms:
rise
• Hypernyms:
person, individual, someone, somebody, mortal, soul
• Hyponyms:
early bird
2. a vertical pipe in a building
• Syn:
riser pipe, riser pipeline, riser main
• Hypernyms:
pipe, pipage, piping
3. structural member consisting of the vertical part of a stair or step
• Hypernyms:
structural member
• Part Holonyms:
step, stair

• Từ đồng nghĩa / Synonyms:
  riser pipe, riser pipeline, riser main