pneumoencephalogram pneumoencephalitis • pneumoenteritis · · · Info · Definitions · Synonyms · Characters · · pneumoencephalogram · · Text Latin · · Script 19 · · Length 8 · · Syllables Definitions · · · (noun) an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast. Synonyms: encephalogram. · · Noun Definition 1 Synonyms · · · encephalogram · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 h latin small letter h U+0068 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 u latin small letter u U+0075