alpha rhythm

English Thesaurus

1. the normal brainwave in the electroencephalogram of a person who is awake but relaxed; occurs with a frequency of 8-12 hertz (noun.phenomenon)

hypernym	:	brain wave, brainwave, cortical potential,
definition	:	(neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph (noun.phenomenon)