interference figure

noun

: a figure observed with a conoscope when a section of a doubly refracting crystal is in the path traversed by convergent plane-polarized light (as when a centered black cross is superimposed over a black spot at the center of a series of concentric colored rings)

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!