IPA: /ˈmaɪəˌgræf/
KK: /maɪəˌgræf/
A device used to record the movements or contractions of muscles.
The scientist used a myograph to study the muscle activity during exercise.
Myograph → It is formed from "myo-" (from Greek "mus" meaning muscle) and "graph" (from Greek "grapho" meaning to write or record). The word "myograph" refers to a device that records muscle activity or contractions.
Think of 'muscle' ('myo-') being 'recorded' ('graph') — that's what a myograph does.