-raf, -rȧf noun
Etymology: my- + -graph
: an apparatus for producing myograms usually consisting essentially of a series of transmitting levers and a revolving recording surface (as a kymograph)
• my·o·graph·ic | ̷ ̷ ̷ ̷|grafik adjective
• my·o·graph·i·cal·ly -fə̇k(ə)lē adverb