a pattern of slow brain waves (alpha waves) in normal persons at rest with closed eyes, thought by some to be associated with an alert but daydreaming mind.
(physiol) the normal bursts of electrical activity from the cerebral cortex of a drowsy or inactive person, occurring at a frequency of 8 to 12 hertz and detectable with an electroencephalograph See also brain wave
See alpha wave
alpha rhythm n.
A pattern of smooth, regular electrical oscillations, as recorded by an electroencephalograph, that occur in the human brain when a person is awake and relaxed. Also called alpha wave.
- Alpha-stannic acid
See under . any of the series of acids usually occurring as amorphous powders and varying in composition from H 2 SnO 3 (alpha-stannic acid) to H 4 SnO 4 .
- Alpha test
an early test of new or updated software or hardware conducted by the developers or manufacturers prior to beta-testing by potential users. to subject (software or hardware) to an alpha test. Historical Examples The alpha test included 212 questions in all, and a correct answer to any question netted the subject one point. Psychology Robert […]
- Alpha stock
noun any of the most active securities on the Stock Exchange of which there are between 100 and 200; at least ten market makers must continuously display the prices of an alpha stock and all transactions in them must be published immediately
- Alpha testing
to subject (software or hardware) to an alpha test. noun an in-house test of a new or modified piece of computer software verb (transitive) to test (software) in this way Compare beta-test programming Testing of software at the developer’s site by the customer. The stage before beta testing. (1996-05-10)