Alpha receptor
a site on a cell that, upon interaction with epinephrine or norepinephrine, controls vasoconstriction, intestinal relaxation, pupil dilation, and other physiological processes.
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- Alpha rhythm
a pattern of slow brain waves (alpha waves) in normal persons at rest with closed eyes, thought by some to be -ssociated with an alert but daydreaming mind. noun (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 […]
- 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)