Search Result for "pneumoencephalogram": 
Wordnet 3.0

NOUN (1)

1. an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast;
[syn: encephalogram, pneumoencephalogram]



WordNet (r) 3.0 (2006):

pneumoencephalogram
    n 1: an X ray of the brain made by replacing spinal fluid with a
         gas (usually oxygen) to improve contrast [syn:
         encephalogram, pneumoencephalogram]