1. brainwave, brain wave, cortical potential, bioelectricity

usage: (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph

2. insight, brainstorm, brainwave, understanding, apprehension, discernment, savvy

usage: the clear (and often sudden) understanding of a complex situation

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See also: brainwave (Dictionary)