binary star

noun
|Updated on: 21 Jul 2018

Definition of binary star

: a system of two stars that revolve around each other under their mutual gravitation

Recent Examples of binary star from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'binary star.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of binary star

1826

in the meaning defined above

See Words from the same year
NEW! Time Traveler

Learn More about binary star


Seen and Heard

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

Love words? Need even more definitions?

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

WORD OF THE DAY

very hard to disturb or upset

Get Word of the Day daily email!

Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet-pasta-spelling-help
  • Which is the correct spelling?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Add Diction

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

TAKE THE QUIZ

Love words? Need even more definitions?

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