kymographic

enUK

ky·mo·graph

K0121400 (kī′mə-grăf′)n. 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.
[Greek kūma, something swollen; see cyma + -graph.]
ky′mo·graph′ic adj.