-
Trending Now:
More Trending:
- implode ballistic transgender beleaguer scaramouch
- ALL
diffusion disk
noun
variants: less commonly
diffusing disk
Definition of diffusion disk
: a piece of transparent material having special markings or embossings used with a photographic lens to give a soft focus or diffused effect to the image
From the M-W Editors
There's more!
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!
Seen and Heard
What made you want to look up diffusion disk? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!