1. An instrument that records wave motion or undulating movements, typically by tracing a continuous line on a moving surface.
Usage: technical; scientific

Examples

• The cymograph was used in the laboratory to measure and document the oscillations of the pendulum.
• Early oceanographers employed the cymograph to record wave patterns at sea.
• The device's stylus moved across the rotating drum, creating a permanent record via the cymograph.
• Scientists relied on the cymograph to visualize complex periodic motions that were difficult to observe directly.