sidereal

adjective
si·​de·​re·​al | \ sī-ˈdir-ē-əl How to pronounce sidereal (audio) , sə-\

Definition of sidereal

: of, relating to, or expressed in relation to stars or constellations : astral

First Known Use of sidereal

1612, in the meaning defined above

History and Etymology for sidereal

Latin sidereus, from sider-, sidus star, constellation

Keep scrolling for more

Learn More about sidereal

Statistics for sidereal

Look-up Popularity

Time Traveler for sidereal

The first known use of sidereal was in 1612

See more words from the same year

More from Merriam-Webster on sidereal

Rhyming Dictionary: Words that rhyme with sidereal

Comments on sidereal

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

WORD OF THE DAY

to move or obtain by small maneuvers

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Bee Cubed

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!