hour angle

noun

Definition of hour angle 

: the angle between the celestial meridian of an observer and the hour circle of a celestial object measured westward from the meridian

First Known Use of hour angle

circa 1837, in the meaning defined above

Keep scrolling for more

Learn More about hour angle

Share hour angle

Statistics for hour angle

Look-up Popularity

Time Traveler for hour angle

The first known use of hour angle was circa 1837

See more words from the same year

More from Merriam-Webster on hour angle

Britannica.com: Encyclopedia article about hour angle

Comments on hour angle

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

WORD OF THE DAY

by word of mouth

Get Word of the Day daily email!

Test Your Vocabulary

Name that Food Quiz

Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
SCRABBLE® Sprint

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!