I get the impression that 柱体 is more mathematical and 圆筒 is more about general "drum shaped" things. Are they interchangeable or is there a distinction?

2 Answers 2


柱体 is used more in geometry and engineering. It means a column-like body, which can be a square or rectangular column 方柱体, circular column 圓柱体, or any shape of columns.

筒 is a bucket. So 圓筒 is a round bucket or a barrel.

  • 2
    Nice explanation. It’s important to note 筒 implies hollowness, but not necessarily 柱體.
    – L Parker
    Apr 25, 2021 at 2:27
  • @L Parker Mr. Parker, thanks for the note.
    – r13
    Apr 25, 2021 at 3:50

(圓)柱體: cylindrical object

圓筒: cylinder

圓筒型 = 圓柱型/狀 = cylindrical

圓筒型物體 = 圓柱型/狀物體 = cylindrical object


Only 圓柱體 is a cylindrical object. There are other forms of 柱體 (column shape objects), e.g. 六角柱體 (hexagonal column-shaped objects), 八角柱體 (octagonal column-shaped objects)

  • In more mathematical terms, 柱體 encapsulates both cylinders and prisms, but not all prismatoids.
    – Michaelyus
    Apr 23, 2021 at 9:51

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