ぶん回まわし

noun

compasses; dividers

Refers to a drawing instrument for circles or measuring distances. The term is somewhat colloquial or informal; the standard word is コンパス.

• ぶん回まわしで円えんを描えがく。

  Draw a circle with compasses.

noun

revolving stage

Used in theater contexts, synonymous with 回り舞台. Likely a colloquial or jargon term.

See also: 回り舞台 (まわりぶたい)

• ぶん回まわしが回まわると場ば面めんが変かわる。

  When the revolving stage turns, the scene changes.