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.
Draw a circle with compasses.
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)
When the revolving stage turns, the scene changes.
Kana spelling; may be used when the kanji is considered non-standard or for clarity.
Compound of ぶん (emphatic prefix) and 回し (noun form of 回す, 'to turn'). The exact derivation is uncertain; it may have arisen as a colloquial term for tools or mechanisms that rotate.