noun (1)
Al·​gol | \ˈal-ˌgäl, -ˌgȯl\

Definition of Algol 

(Entry 1 of 2)

: a binary star in the constellation Perseus whose larger member orbits and eclipses the smaller, brighter star causing periodic variation in brightness


noun (2)
AL·​GOL | \ˈal-ˌgäl, -ˌgȯl\
variants: or Algol

Definition of ALGOL (Entry 2 of 2)

: an algebraic computer programming language used especially in mathematical and scientific applications

First Known Use of Algol

Noun (1)

14th century, in the meaning defined above

Noun (2)

1959, in the meaning defined above

History and Etymology for Algol

Noun (1)

Arabic al-ghūl, literally, the ghoul

Noun (2)

algorithmic language

Keep scrolling for more

Learn More about Algol

Statistics for Algol

Look-up Popularity

Time Traveler for Algol

The first known use of Algol was in the 14th century

See more words from the same century

More from Merriam-Webster on Algol

See words that rhyme with Algol

Comments on Algol

What made you want to look up Algol? Please tell us where you read or heard it (including the quote, if possible).


to express warning or disapproval

Get Word of the Day daily email!

Test Your Vocabulary

Autumn Words of the Day 2018

  • a-top-down-image-of-road-through-an-autumn-forest
  • Which is a synonym of fugacious?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Add Diction

Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!