| Noun | 1. | encephalogram - a graphical record of electrical activity of the brain; produced by an electroencephalograph graph, graphical record - a visual representation of the relations between certain quantities plotted with reference to a set of axes |
| 2. | encephalogram - an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast roentgenogram, X-ray photograph, X-ray picture, X ray, X-ray - a radiogram made by exposing photographic film to X rays; used in medical diagnosis |