Airy disk

noun

Definition of Airy disk

: the bright central spot in the system of diffraction rings formed by an optical system with light from a point source (as a star)

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

First Known Use of Airy disk

1923, in the meaning defined above

History and Etymology for Airy disk

after George Biddell Airy †1892 English mathematician and astronomer

Keep scrolling for more

Learn More About Airy disk

Time Traveler for Airy disk

Time Traveler

The first known use of Airy disk was in 1923

See more words from the same year

Dictionary Entries Near Airy disk

airy

Airy disk

airy-fairy

See More Nearby Entries 

Statistics for Airy disk

Cite this Entry

“Airy disk.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Airy%20disk. Accessed 28 Jul. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

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!