pneumoencephalogram

[noo-moh-en-sef-uh-luh-gram, nyoo-]
noun Medicine/Medical.
  1. an encephalogram made after the replacement of the cerebrospinal fluid by air or gas, rarely used since the development of the CAT scanner.

Origin of pneumoencephalogram

First recorded in 1930–35; pneumo- + encephalogram
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for pneumoencephalogram

pneumoencephalogram

Derived Formspneumoencephalography (ˌnjuːməʊɛnˌsɛfəˈlɒɡrəfɪ), noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012