encephalogram
1. a graphical record of electrical activity of the brain; produced by an electroencephalograph • Syn: electroencephalogram, EEG • Hypernyms: graph, graphical record 2. an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast • Syn: pneumoencephalogram • Hypernyms: roentgenogram, X ray, X-ray, X-ray picture, X-ray photograph
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