Kymogram vs. Kymograph — What's the Difference?

A graph or record made by a kymograph.

A kymograph (from Greek κῦμα, swell or wave + γραφή, writing; also called a kymographion) is a device that draws a graphical representation of spatial position over time in which a spatial axis represents time. It basically consists of a revolving drum wrapped with a sheet of paper on which a stylus moves back and forth recording perceived changes of phenomena such as motion or pressure.The kymograph was initially a mechanical and hydraulic device, invented by German physiologist Carl Ludwig in the 1840s, and found its first use as a means to monitor blood pressure.

A graphical record produced by a kymograph.

An instrument for recording variations in pressure, as of the blood, or in tension, as of a muscle, by means of a pen or stylus that marks a rotating drum.

A device that gives a graphical representation of a variation in a phenomenon such as blood pressure over time, using a pen on a rotating drum.

An instrument for measuring, and recording graphically, the pressure of the blood in any of the blood vessels of a living animal; - called also kymographion.

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