e·lec·tro·my·o·graph [ i lèktrō m ə gràf ](plurale·lec·tro·my·o·graphs)
noun
Definition:
machine for producing electromyogram: a machine for producing a graphical tracing of the electrical activity picked up via electrodes inserted into muscle tissue. It consists of an amplifier, an electrically activated trace-drawing pen, and a moving strip of paper.