a star of the second magnitude in the constellation Perseus: the first known and most famous eclipsing binary star.
a computer language in which information is expressed in algebraic notation and according to the rules of Boolean algebra.
Historical Examples

Pulling her out and reviving her caused so much confusion, it wasn’t until then that they discovered Algol had disappeared.
Collector’s Item Evelyn E. Smith

The most easterly one is β Persei, known as Algol, the famous variable.
A Field Book of the Stars William Tyler Olcott

It is for this reason that Algol varies in brightness in this period.
Astronomy for Young Folks Isabel Martin Lewis

Algenib and Algol form with γ Andromedæ, a right-angled triangle.
A Field Book of the Stars William Tyler Olcott

This dark star sometimes comes between Algol and the observer and cuts off the light.
Young Folks’ Library, Volume XI (of 20) Various

Mention has been made of a slight irregularity in Algol’s period of variation.
Pleasures of the telescope Garrett Serviss

Every third night Algol has its light reduced for several hours.
The Outline of Science, Vol. 1 (of 4) J. Arthur Thomson

Mr. Gore thinks that the companion of Algol may be a star of the sixth magnitude.
Astronomy of To-day Cecil G. Dolmage

Stars of this class are all very remote, and no attempt has as yet been made to ascertain the parallax of Algol.
The Astronomy of Milton’s ‘Paradise Lost’ Thomas Orchard

It was first supposed to be of the Algol type, with a period of about two days.
The Popular Science Monthly, October, 1900 Various

the second brightest star in Perseus, the first known eclipsing binary. Visual magnitude: 2.2–3.5; period: 68.8 hours; spectral type (brighter component): B8V
a computer programming language designed for mathematical and scientific purposes; a high-level language

Beta Persei, variable star in the constellation Perseus, late 14c., literally “the Demon,” from Arabic al-ghul “the demon” (see ghoul). It corresponds, in modern representations of the constellation, to the gorgon’s head Perseus is holding, but it probably was so called because it visibly varies in brightness every three days, which sets it apart from other bright stars. The computer language (1959) is a contraction of algo(rithmic) l(anguage); see algorithm.

Algorithmic-Oriented Language


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