Definition

1. Noun:
   • A scientific instrument for recording physiological data: A kymograph is a device that produces a continuous graphical record (a kymogram) of variations in a physiological process, such as blood pressure, muscle contraction, or breathing, over time. It typically consists of a rotating drum covered with paper, against which a stylus moves in response to the measured changes.

Usage Examples

• Noun:
  • The classic kymograph was essential for early 20th-century physiology experiments.
  • He used a kymograph to record the changes in arterial pressure.
  • The trace on the kymograph paper showed a regular respiratory rhythm.

Advanced Usage

• "Kymographic recording": Refers to the data or trace produced by a kymograph.
  • The kymographic recording provided clear evidence of the drug's effect on heart rate.

Variants and Related Words

• Kymogram (n): The graphical record or tracing produced by a kymograph.
  • The kymogram displayed several distinct peaks corresponding to muscle twitches.

Synonyms

• Physiograph: A more modern, often electronic, instrument for recording physiological processes.
• Recorder: A general term for an instrument that registers data, though less specific.

Notes on Meaning

• The kymograph is a historical instrument largely replaced by digital data acquisition systems in modern laboratories. Its primary function was to provide a visual, analog record of continuous physiological signals. The term is now most commonly encountered in historical or educational contexts describing classic experimental methods.

Noun

1. scientific instrument consisting of a rotating drum holding paper on which a stylus traces a continuous record (as of breathing or blood pressure)