kymograph

 
Pronunciation: /ˈkʌɪmə(ʊ)grɑːf/

noun

  • an instrument for recording variations in pressure, e.g. in sound waves or in blood within blood vessels, by the trace of a stylus on a rotating cylinder.

Derivatives

kymographic

Pronunciation: /-ˈgrafɪk/
adjective

Origin:

mid 19th century: from Greek kuma 'wave' + -graph