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alp
alpaca
alpargat
alpenglow
alpenhorn
alpenstock
alpestrine
Alpha
alpha
alpha 1-antitrypsin deficiency
alpha and omega
alpha-blocker
Alpha Centauri
alpha-chymotrypsin
alpha decay
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alpha emitter
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alpha rhythm
al·pha rhythm (plural al·pha rhythms)


noun 
Definition:
 
brain activity: the pattern of electrical activity in the brain of somebody awake but relaxed or drowsy, registering on an electroencephalograph at a reading between 8 and 13 hertz
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