equation of time

noun phrase

Definition of equation of time 

: the difference between apparent time and mean time usually expressed as a correction which is to be added to apparent time to give local mean time

First Known Use of equation of time

1667, in the meaning defined above

Keep scrolling for more

Learn More about equation of time

Share equation of time

Statistics for equation of time

Look-up Popularity

Time Traveler for equation of time

The first known use of equation of time was in 1667

See more words from the same year

Comments on equation of time

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


one that holds something together

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Word Winder's CrossWinder

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!