1. [ noun ] (photography) an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast
Synonyms: pneumoencephalogram
Related terms: roentgenogram
2. [ noun ] (medicine) a graphical record of electrical activity of the brain; produced by an electroencephalograph
Synonyms: EEG brain_scan electroencephalogram
Related terms: graph
Similar spelling:   encephalography