achromatic prism


Definition of achromatic prism

: a prism made by combining two or more prisms of different refractive index so designed and placed that a ray of white or other nonhomogeneous light passing through the prism is deviated but not dispersed into a spectrum — compare amici prism

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 achromatic prism

1802, in the meaning defined above

Keep scrolling for more

Learn More about achromatic prism

Time Traveler for achromatic prism

Time Traveler

The first known use of achromatic prism was in 1802

See more words from the same year

Statistics for achromatic prism

Cite this Entry

“Achromatic prism.” Dictionary, Merriam-Webster, Accessed 15 Aug. 2020.

Comments on achromatic prism

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


Test Your Vocabulary

Name That Thing: Animal Edition

  • alt 5a023732e6f75
  • Name that animal:
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

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!