brain waves

brain wave

 
noun
1.
Usually, brain waves. Medicine/Medical. electrical potentials or impulses given off by brain tissue. Compare alpha rhythm, beta rhythm, delta rhythm.
2.
Informal. a sudden idea or inspiration; brainstorm.
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Origin:
1865–70
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Brain waves is always a great word to know.
So is doohickey. Does it mean:
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
a gadget; dingus; thingumbob.
LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...
American Heritage
Medical Dictionary

brain wave n.
A rhythmic fluctuation of electric potential between parts of the brain, as seen on an electroencephalogram.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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