Dictionaryen•ceph•a•lo•gramPronunciation: (en-sef'u-lu-gram"), [key] —n. Med. an x-ray of the brain, usually involving replacement of some cerebrospinal fluid by air or other gas that circulates to the brain's ventricular spaces and acts as a contrast medium. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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