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alpha British & World English

The first letter of the Greek alphabet (Α, α), transliterated as ‘a’

alpha New Oxford Dictionary for Writers & Editors

first letter of the Greek alphabet (Α, α), transliterated as ‘a’

Alpha in alpha British & World English

The first (typically the brightest) star in a constellation

alpha geek British & World English

A person who has great expertise in computing and related technology

alpha male British & World English

The dominant male animal in a particular group

alpha test British & World English

A trial of machinery, software, or other products carried out by a developer before a product is made available for beta testing

alpha test New Oxford Dictionary for Writers & Editors

(two words, hyphen as verb)

alpha blocker British & World English

Any of a class of drugs which prevent the stimulation of the adrenergic receptors responsible for increased blood pressure

alpha rhythm British & World English

The normal electrical activity of the brain when conscious and relaxed, consisting of oscillations (alpha waves) with a frequency of 8 to 13 hertz

alpha version British & World English

A version of a piece of software that is made available for testing, typically by employees of the company that is developing it, before its general release

Alpha Centauri British & World English

The third-brightest star in the sky, in the constellation Centaurus, visible only to observers in the southern hemisphere. It is the nearest bright star to the solar system (distance 4.34 light years), and is a visual binary

alpha particle British & World English

A helium nucleus emitted by some radioactive substances, originally regarded as a ray

alpha radiation British & World English

Ionizing radiation consisting of alpha particles, emitted by some substances undergoing radioactive decay

alpha and omega British & World English

The beginning and the end (used by Christians as a title for Jesus)

alpha-hydroxy acid British & World English

An organic acid containing a hydroxyl group bonded to the carbon atom adjacent to the carboxylic acid group. A number of such compounds are used in skincare preparations for their exfoliating properties

alpha-test in alpha test British & World English

Subject (a product) to an alpha test

alpha and omega in alpha British & World English

The beginning and the end (used by Christians as a title for Jesus)

alphanumeric British & World English

Consisting of or using both letters and numerals

alphafetoprotein British & World English

A protein produced by a fetus which is present in amniotic fluid and the bloodstream of the mother. Levels of the protein can be measured to detect certain congenital defects such as spina bifida and Down’s syndrome

alpha waves in alpha rhythm British & World English

The normal electrical activity of the brain when conscious and relaxed, consisting of oscillations (alpha waves) with a frequency of 8 to 13 hertz