柱時計

1. Origins, structure, and basic meaning

• Structure: 柱時計(はしらどけい) is a noun for a wall-mounted clock with a pendulum.
• Basic usage: The clock announces the time in 柱時計が九時を告げる, while a component appears in 柱時計の振り子.

2. Common pitfalls and similar expressions

• Clock and pendulum
  • 柱時計 names the whole clock, while 振り子 is the swinging pendulum within it.
• Compound reading
  • With 時計 as the second element, the compound is read はしらどけい.