Electroencephalograph means: Electroencephalograph EEG e-lektro-n-sef’-lo-graf: a machine used for ElectroEncephaloGraphy EEG The combining form Electro is Electricity. The combining form Encephalo can be translated as Brain. The suffix “graph” refers to an instrument or machine. (in Open Dictionary, added by Jaiden Whitney)

What else does Electroencephalograph mean?

A device that records the electrical activity in the brain by measuring electrical potentials at the scalp. (in Merlin Dictionary)