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[ih-lek-troh-en-sef-uh-luh-graf, -grahf] /ɪˌlɛk troʊ ɛnˈsɛf ə ləˌgræf, -ˌgrɑf/
noun, Medicine/Medical.
an instrument for measuring and recording the electric activity of the brain.
Origin of electroencephalograph
First recorded in 1935-40; electro- + encephalograph
Related forms
[ih-lek-troh-en-sef-uh-luh-graf-ik] /ɪˌlɛk troʊ ɛnˌsɛf ə ləˈgræf ɪk/ (Show IPA),
electroencephalographical, adjective
electroencephalographically, adverb
[ih-lek-troh-en-sef-uh-log-ruh-fee] /ɪˌlɛk troʊ ɛnˌsɛf əˈlɒg rə fi/ (Show IPA),
noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for electroencephalograph
Historical Examples
  • A peculiar mixture of radio and the electroencephalograph, I think.

  • The Attison Detector was developed, a cross between radar and the electroencephalograph.

    The Hour of Battle Robert Sheckley
British Dictionary definitions for electroencephalograph


/ɪˌlɛktrəʊɛnˈsɛfələˌɡrɑːf; -ˌɡræf/
an instrument for recording the electrical activity of the brain, usually by means of electrodes placed on the scalp: used to diagnose tumours of the brain, to study brain waves, etc EEG See also brain wave
Derived Forms
electroencephalographic, adjective
electroencephalographically, adverb
electroencephalography (ɪˌlɛktrəʊɛnˌsɛfəˈlɒɡrəfɪ) 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
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electroencephalograph in Medicine

electroencephalograph e·lec·tro·en·ceph·a·lo·graph (ĭ-lěk'trō-ěn-sěf'ə-lə-grāf')
An instrument that generates a record of the electrical activity of the brain by measuring electric potentials using electrodes attached to the scalp.

e·lec'tro·en·ceph'a·lo·graph'ic adj.
e·lec'tro·en·ceph'a·log'ra·phy (-lŏg'rə-fē) n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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