Definition of Hess image
: a third positive afterimage in a succession of visual afterimages resulting from a brief light stimulus
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!
Origin and Etymology of hess image
after Carl von Hess †1923 German ophthalmologist
Seen and Heard
What made you want to look up Hess image? Please tell us where you read or heard it (including the quote, if possible).